UNITED STATES
                    SECURITIES AND EXCHANGE COMMISSION
                          Washington, D.C. 20549

                                FORM N-CSR

          CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT
                           INVESTMENT COMPANIES


Investment Company Act file number 811-07456

Name of Fund:  BlackRock Senior High Income Fund, Inc.

Fund Address:  P.O. Box 9011
               Princeton, NJ  08543-9011

Name and address of agent for service:  Robert C. Doll, Jr., Chief Executive
       Officer, BlackRock Senior High Income Fund, Inc., 800 Scudders Mill
       Road, Plainsboro, NJ, 08536.  Mailing address:  P.O. Box 9011,
       Princeton, NJ, 08543-9011

Registrant's telephone number, including area code:  (609) 282-2800

Date of fiscal year end: 02/28/07

Date of reporting period: 03/01/06 - 02/28/07

Item 1 - Report to Stockholders


ALTERNATIVES   BLACKROCK SOLUTIONS   EQUITIES   FIXED INCOME   LIQUIDITY
REAL ESTATE


BlackRock Senior High Income
Fund, Inc.


ANNUAL REPORT    FEBRUARY 28, 2007


(BLACKROCK logo)


NOT FDIC INSURED
MAY LOSE VALUE
NO BANK GUARANTEE


BlackRock Senior High Income Fund, Inc. seeks to provide shareholders with
high current income by investing at least 80% of its net assets plus any
borrowings for investment purposes in senior debt obligations, including
corporate loans and both privately placed and publicly offered corporate
bonds and notes. Senior debt obligations generally include debt obligations
of a company that have a contractual right to repayment in the event of a
default or bankruptcy of the company with priority over existing or future
subordinated debt (if any), preferred stock or common stock of the same
company. Senior debt ranks equally in right of payment to all other debt of
the company other than debt that is contractually subordinated in right of
payment to such senior debt. Senior debt in which the Fund invests may be
secured by collateral or may be unsecured. Certain senior debt obligations may
be effectively junior to other debt obligations of the company that are
secured by collateral, as well as to any indebtedness of such company's
subsidiaries or affiliates. The Fund invests primarily in debt obligations
that are rated in the lower rating categories of the established rating
services (Baa or lower by Moody's Investors Service, Inc. or BBB or lower by
Standard & Poor's) or unrated debt obligations of comparable quality. The Fund
will generally not invest in securities rated at the time of purchase, Caa/CCC
or below by each of the major ratings agencies that rate the securities.

This report, including the financial information herein, is transmitted to
shareholders of BlackRock Senior High Income Fund, Inc. for their information.
It is not a prospectus. Past performance results shown in this report should
not be considered a representation of future performance. The Fund leverages
its Common Stock to provide Common Stock shareholders with a potentially
higher rate of return. Leverage creates risk for Common Stock shareholders,
including the likelihood of greater volatility of net asset value and market
price of Common Stock shares, and the risk that fluctuations in short-term
interest rates may reduce the Common Stock's yield. Statements and other
information herein are as dated and are subject to change.

A description of the policies and procedures that the Fund uses to determine
how to vote proxies relating to portfolio securities is available (1)
without charge, upon request, by calling toll-free 1-800-441-7762; (2) at
www.blackrock.com; and (3) on the Securities and Exchange Commission's Web
site at http://www.sec.gov. Information about how the Fund voted proxies
relating to securities held in the Fund's portfolio during the most recent
12-month period ended June 30 is available (1) at www.blackrock.com and (2) on
the Securities and Exchange Commission's Web site at http://www.sec.gov.


BlackRock Senior High Income Fund, Inc.
P.O. Box 9011
Princeton, NJ 08543-9011


(GO PAPERLESS... logo)
It's Fast, Convenient, & Timely!



BlackRock Senior High Income Fund, Inc.


The Benefits and Risks of Leveraging


BlackRock Senior High Income Fund, Inc. (the "Fund") utilizes leveraging
through borrowings or issuance of short-term debt securities or shares of
Preferred Stock. The concept of leveraging is based on the premise that the
cost of assets to be obtained from leverage will be based on short-term
interest rates, which normally will be lower than the income earned by the
Fund on its longer-term portfolio investments. To the extent that the total
assets of the Fund (including the assets obtained from leverage) are invested
in higher-yielding portfolio investments, the Fund's Common Stock shareholders
will be the beneficiaries of the incremental yield.

Leverage creates risks for holders of Common Stock including the likelihood of
greater net asset value and market price volatility. In addition, there is the
risk that fluctuations in interest rates on borrowings (or in the dividend
rates on any Preferred Stock, if the Fund were to issue the Preferred Stock)
may reduce the Common Stock's yield and negatively impact its net asset value
and market price. If the income derived from securities purchased with assets
received from leverage exceeds the cost of leverage, the Fund's net income
will be greater than if leverage had not been used. Conversely, if the income
from the securities purchased is not sufficient to cover the cost of leverage,
the Fund's net income will be less than if leverage had not been used, and
therefore the amount available for distribution to Common Stock shareholders
will be reduced.



Announcement of Annual Stockholders Meeting


The Fund has determined that its annual stockholders meeting originally
scheduled to be held in April 2007 will be postponed and will be held in
September 2007. Proposals of stockholders intended to be presented at the
meeting must be received by the Fund by May 15, 2007 for inclusion in the
Fund's proxy statement and form of proxy for that meeting. The persons named
as proxies in the proxy materials for the Fund's 2007 annual meeting of
stockholders may exercise discretionary authority with respect to any
stockholder proposal presented at such meeting if written notice of such
proposal has not been received by the Fund by July 1, 2007. Written proposals
and notices should be sent to the Secretary of the Fund, 800 Scudders Mill
Road, Plainsboro, New Jersey 08536.



Availability of Quarterly Schedule of Investments


The Fund files its complete schedule of portfolio holdings with the Securities
and Exchange Commission ("SEC") for the first and third quarters of each fiscal
year on Form N-Q. The Fund's Forms N-Q are available on the SEC's Web site at
http://www.sec.gov. The Fund's Forms N-Q may also be reviewed and copied at the
SEC's Public Reference Room in Washington, DC. Information on the operation of
the Public Reference Room may be obtained by calling 1-800-SEC-0330.



Electronic Delivery


Electronic copies of most financial reports and prospectuses are available on
the Fund's Web site. Shareholders can sign up for e-mail notifications of
quarterly statements, annual and semi-annual reports and prospectuses by
enrolling in the Fund's electronic delivery program.

To enroll:

Shareholders Who Hold Accounts with Investment Advisers, Banks or Brokerages:

Please contact your financial advisor. Please note that not all investment
advisers, banks or brokerages may offer this service.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



A Letter to Shareholders


Dear Shareholder

The new year began on a positive note for most financial markets, continuing
the momentum from the fourth quarter of 2006. At the end of February, however,
global equity markets registered their first significant decline since last
summer. The market jitters were triggered by a significant setback in the
Chinese market and were exacerbated by several concerns, notably a weakening
economy, some disappointing corporate earnings announcements, geopolitical
concerns related to Iran's nuclear program and increasing delinquencies in the
subprime mortgage market. Despite the recent spate of volatility, underlying
stock market fundamentals appear quite sound, supported by a generally good
global economic backdrop, tame inflation, relatively low interest rates and
attractive valuations.

Not unlike the equity market, the bond market also has seen volatility
recently as observers have attempted to interpret mixed economic signals. A
bond market rally late last year reversed early in 2007 as the economic data
strengthened. Prices improved (and yields fell) again in February as equities
struggled. Notably, the Treasury curve remained inverted for much of 2006 and
into 2007. The 30-year Treasury yield stood at 4.68% on February 28, 2007,
while the one-month Treasury offered the highest yield on the curve at 5.24%.

For its part, the Federal Reserve Board (the Fed) has left the target short-
term interest rate on hold at 5.25% since first pausing on August 8, 2006.
Although the central bankers continue to express concern about potential
inflationary pressures, they also have made reference to signs of economic
weakness in their public statements. Most observers expect the Fed to keep
interest rates on hold for now, but acknowledge that the combination of a mild
economic slowdown and moderating inflation could prompt an interest rate cut
later in 2007.

Notwithstanding the volatility along the way, most major market indexes
managed to post positive returns for the annual and semi-annual reporting
periods ended February 28, 2007:




Total Returns as of February 28, 2007                                      6-month       12-month
                                                                                    
U.S. equities (Standard & Poor's 500 Index)                                + 8.93%        +11.97%
Small cap U.S. equities (Russell 2000 Index)                               +10.76         + 9.87
International equities (MSCI Europe, Australasia, Far East Index)          +12.17         +21.07
Fixed income (Lehman Brothers Aggregate Bond Index)                        + 3.66         + 5.54
Tax-exempt fixed income (Lehman Brothers Municipal Bond Index)             + 2.89         + 4.96
High yield bonds (Credit Suisse High Yield Index)                          + 8.62         +12.36



If the recent market movements are any guide, 2007 could be a year of enhanced
market volatility. As you navigate the uncertainties of the financial markets,
we encourage you to review your investment goals with your financial
professional and to make portfolio changes, as needed. We thank you for
trusting BlackRock with your investment assets, and we look forward to
continuing to serve you in the months and years ahead.


Sincerely,


(Robert C. Doll, Jr.)
Robert C. Doll, Jr.
Fund President and Director



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



A Discussion With Your Fund's Portfolio Managers


The Fund considerably outperformed its benchmark return for the annual period,
benefiting primarily from its use of leverage.


How did the Fund perform during the fiscal year in light of the existing
market conditions?

For the 12-month period ended February 28, 2007, the Common Stock of BlackRock
Senior High Income Fund, Inc. had net annualized yields of 9.14% and 8.64%,
based on a year-end per share net asset value of $6.17 and a per share market
price of $6.53, respectively, and $0.564 per share income dividends. Over the
same period, the total investment return on the Fund's Common Stock was
+12.82%, based on a change in per share net asset value from $6.00 to $6.17,
and assuming reinvestment of all distributions. The Fund's total return for
the period outpaced the +9.95% return of its benchmark, which is an equal
blend of the Credit Suisse High Yield Index and the Credit Suisse Leveraged
Loan Index.

For the six-month period ended February 28, 2007, the total investment return
on the Fund's Common Stock was +7.67%, based on a change in per share net
asset value from $6.00 to $6.17, and assuming reinvestment of all
distributions. The blended benchmark returned +6.39% for the six-month period.

For a description of the Fund's total investment return based on a change in
the per share market value of the Fund's Common Stock (as measured by the
trading price of the Fund's shares on the New York Stock Exchange), and
assuming reinvestment of distributions, please refer to the Financial
Highlights section of this report. As a closed-end fund, the Fund's shares may
trade in the secondary market at a premium or discount to the Fund's net asset
value. As a result, total investment returns based on changes in the market
value of the Fund's Common Stock can vary significantly from total investment
returns based on changes in the Fund's net asset value.

The leveraged loan market, as measured by the Credit Suisse Leveraged Loan
Index, returned +7.57% for the annual period, while the high yield bond
market, as measured by the Credit Suisse High Yield Index, returned +12.36%.
Despite some volatility late in the reporting period, the non-investment grade
markets continued to post strong results. The leveraged loan market posted
positive returns in all of the past 12 months, while the high yield market saw
positive returns in 11 of the past 12 months. The markets have been aided by
the continuation of historically low default rates and strong inflows into the
asset classes, both of which have helped to support the prices of the
underlying issues.

Support for the leveraged loan market also came from soaring investor demand,
which pushed spreads to new lows. The primary driver of this demand is
collateralized loan obligations (CLOs), which now account for approximately
two-thirds of the leveraged loan market. The cost of funding for these CLOs
has dropped dramatically over the past few years, enabling the structured
finance vehicles to absorb bank loans at increasingly tighter spreads and
still achieve their targeted equity returns. The fact that default rates are
at historic lows also has assisted this trend. To supply the CLO juggernaut,
the demand for bank loans has been so voracious that we've actually seen bond
deals migrate to the loan market, a reversal of historic flows that typically
saw deals move from loans into bonds. This trend has marginally curtailed the
supply of high yield bonds, keeping spreads there tighter than they otherwise
would be.


What factors most influenced Fund performance?

The Fund benefited from its overweight exposure to floating rate high yield
bonds and bank loans as opposed to fixed rate high yield issues, in light of
the inverted yield curve. The Fund continued to make extensive use of its
leverage line, with an average level of about 30% of total assets. This was
the primary driver of the Fund's outperformance relative to its benchmark.
(For a complete explanation of the benefits and risks of leveraging, refer to
page 2 of this report to shareholders.)


What changes were made to the Fund during the period?

During the period, BlackRock, Inc. and Merrill Lynch & Co., Inc. ("Merrill
Lynch") combined Merrill Lynch's investment management business, Merrill Lynch
Investment Managers, L.P. and its affiliates, including Fund Asset Management,
L.P., with BlackRock, Inc. to form a new independent company. While this
resulted in some additions to the portfolio management team, there was no
change in the overall investment philosophy or focus of the Fund.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



How would you characterize the Fund's position at the close of the period?

While volatility picked up at the end of the period, resulting in an investor
flight to quality, fundamental and technical valuations remained favorable for
the leveraged loan and high yield markets. Even with the noise at the end of
the reporting period, the leveraged loan market posted a return of +.74% in
February, while the high yield market posted a return of better than +1%. This
marked the seventh month out of eight in which the Credit Suisse High Yield
Index posted monthly returns in excess of 1% and the eighth consecutive month
that the Credit Suisse Leveraged Loan Index posted returns of at least +.50%.
Market fundamentals remain very strong, with default rates near historical
lows and a new-issue calendar that is just beginning to satisfy the non-
investment grade investor.

By and large, borrowers continue to have access to strong liquidity, another
force keeping default rates low. Moreover, earnings are expected to grow
strongly over the near-term. In our view, with such conditions in place for
the bank loan market, investors appear encouraged and ready to support new
deals and further spread tightening in the sector.


Kevin J. Booth
Vice President and Portfolio Manager


Mark J. Williams
Portfolio Manager


April 3, 2007



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Portfolio Information


As of February 28, 2007


                                                       Percent of
Ten Largest Holdings                                   Net Assets

Charter Communications, Inc. Term Loan B,
  7.985% due 4/28/2013                                     2.3%
Wellman, Inc. First Lien Term Loan, 9.36%
  due 2/10/2009                                            2.3
Waste Services, Inc. Term Loan D,
  8.06% - 8.07% due 3/31/2011                              2.2
Bowater, Inc., 8.355% due 3/15/2010                        2.2
Frontier Drilling Term Loan B, 8.62% - 8.68%
  due 6/21/2013                                            1.7
CCM Merger, Inc. 8% due 8/01/2013                          1.7
Omnova Solutions, Inc., 11.25%
  due 6/01/2010                                            1.6
NewPage Corp., 11.61% due 5/01/2012                        1.6
Rainbow National Services LLC, 8.75%
  due 9/01/2012                                            1.6
Vought Aircraft Industries, Inc., 8%
  due 7/15/2011                                            1.5



                                                       Percent of
Five Largest Industries                                Net Assets

Cable--U.S.                                               14.9%
Chemicals                                                 13.1
Paper                                                     10.0
Automotive                                                 9.8
Information Technology                                     8.0

   For Fund compliance purposes, the Fund's industry classifications
   refer to any one or more of the industry sub-classifications used
   by one or more widely recognized market indexes or ratings group
   indexes, and/or as defined by Fund management. This definition
   may not apply for purposes of this report, which may combine
   industry sub-classifications for reporting ease.



                                                       Percent of
                                                         Total
Quality Ratings by S&P/Moody's                        Investments

BBB/Baa                                                    0.1%
BB/Ba                                                     19.4
B/B                                                       68.2
CCC/Caa                                                    6.2
CC/Ca                                                      0.6
NR (Not Rated)                                             4.3
Other*                                                     1.2

 * Includes portfolio holdings in common stocks, warrants, other
   interests and short-term investments.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Schedule of Investments as of February 28, 2007               (in U.S. dollars)


         Face
       Amount   Corporate Bonds                                        Value

Aerospace & Defense--1.7%

  $   190,000   Argo-Tech Corp., 9.25% due 6/01/2011             $      206,150
      200,000   TransDigm, Inc., 7.75% due 7/15/2014 (i)                205,500
    5,510,000   Vought Aircraft Industries, Inc., 8%
                   due 7/15/2011                                      5,372,250
                                                                 --------------
                                                                      5,783,900

Automotive--4.2%

      345,000   Delco Remy International, Inc., 9.36%
                   due 4/15/2009 (f)                                    335,512
                Ford Motor Credit Co.:
      680,000         5.80% due 1/12/2009                               667,925
    2,240,000         8.11% due 1/13/2012 (f)                         2,252,087
      250,000         9.81% due 4/15/2012 (f)                           270,368
                The Goodyear Tire & Rubber Co. (i):
    5,070,000         9.14% due 12/01/2009 (f)                        5,120,700
      910,000         8.625% due 12/01/2011                             966,875
    2,220,000   Lear Corp., 8.75% due 12/01/2016                      2,139,525
    1,175,000   Metaldyne Corp.,11% due 6/15/2012                     1,098,625
      770,000   Titan International, Inc., 8% due 1/15/2012 (i)         785,400
      990,000   United Auto Group, Inc., 7.75%
                   due 12/15/2016 (i)                                 1,007,325
                Venture Holdings Co. LLC:
      700,000         12% due 6/01/2009 (c)                                   0
    3,325,000         Series B, 9.50% due 7/01/2005 (b)                   8,313
                                                                 --------------
                                                                     14,652,655

Broadcasting--0.5%

      500,000   LIN Television Corp. Series B, 6.50%
                   due 5/15/2013                                        487,500
    1,325,000   Paxson Communications Corp., 8.61%
                   due 1/15/2012 (f)(i)                               1,348,188
                                                                 --------------
                                                                      1,835,688

Cable--International--0.1%

      350,000   NTL Cable Plc, 8.75% due 4/15/2014                      364,875

Cable--U.S.--7.9%

    3,175,000   Cablevision Systems Corp. Series B, 9.87%
                   due 4/01/2009 (f)                                  3,381,375
                Charter Communications Holdings LLC:
    1,750,000         10% due 4/01/2009                               1,750,000
    1,000,000         11.75% due 1/15/2010                            1,000,000
    2,000,000         11.125% due 1/15/2011                           1,970,000
    1,000,000         10% due 5/15/2011                                 985,000
                Intelsat Bermuda Ltd. (f)(i):
      275,000         11.354% due 6/15/2013                             294,937
    2,240,000         8.872% due 1/15/2015                            2,293,200
                Intelsat Subsidiary Holding Co. Ltd.:
    1,675,000         8.25% due 1/15/2013                             1,746,187
    2,400,000         8.625% due 1/15/2015                            2,580,000
    1,875,000   Mediacom LLC, 9.50% due 1/15/2013                     1,926,562
    3,410,000   PanAmSat Corp., 9% due 6/15/2016 (i)                  3,742,475
    5,250,000   Rainbow National Services LLC, 8.75%
                   due 9/01/2012 (i)                                  5,578,125
                                                                 --------------
                                                                     27,247,861

Chemicals--8.5%

      610,000   American Pacific Corp., 9% due 2/01/2015 (i)            615,337
    1,350,000   ArCo Chemical Co., 9.80% due 2/01/2020                1,582,875
    2,250,000   Compass Minerals International, Inc. Series B,
                   12% due 6/01/2013 (j)                              2,182,500



         Face
       Amount   Corporate Bonds                                        Value

Chemicals (concluded)

  $ 4,382,000   GEO Specialty Chemicals, Inc.,13.86%
                   due 12/31/2009 (h)                            $    3,615,150
                Lyondell Chemical Co.:
    1,650,000         11.125% due 7/15/2012                           1,765,500
    3,950,000         8% due 9/15/2014                                4,157,375
      830,000         8.25% due 9/15/2016                               892,250
    1,200,000   Millennium America, Inc., 7.625%
                   due 11/15/2026                                     1,176,000
      430,000   Momentive Performance Materials, Inc.,10.125%
                   due 12/01/2014 (i)(m)                                452,575
    4,690,000   NOVA Chemicals Corp., 8.502%
                   due 11/15/2013 (f)                                 4,690,000
    5,350,000   Omnova Solutions, Inc.,11.25% due 6/01/2010           5,717,813
    1,000,000   PolyOne Corp., 6.89% due 9/22/2008                      962,500
    1,322,000   Rockwood Specialties Group, Inc.,10.625%
                   due 5/15/2011                                      1,394,710
      395,000   Terra Capital, Inc., 7% due 2/01/2017 (i)               393,025
                                                                 --------------
                                                                     29,597,610

Consumer--Durables--1.3%

    4,450,000   Simmons Bedding Co., 7.875% due 1/15/2014             4,561,250

Consumer--Non-Durables--3.3%

    4,725,000   Hines Nurseries, Inc.,10.25% due 10/01/2011           3,969,000
    2,000,000   Levi Strauss & Co.,10.11% due 4/01/2012 (f)           2,042,500
    2,125,000   North Atlantic Trading Co., 9.25% due 3/01/2012       1,939,063
    3,525,000   Quiksilver, Inc., 6.875% due 4/15/2015                3,436,875
                                                                 --------------
                                                                     11,387,438

Diversified Media--1.9%

                Affinion Group, Inc.:
      120,000         10.125% due 10/15/2013                            129,600
      300,000         11.50% due 10/15/2015                             325,500
    1,960,000   Idearc Inc., 8% due 11/15/2016 (i)                    2,013,900
      245,000   Network Communications, Inc.,10.75%
                   due 12/01/2013                                       252,962
    1,350,000   Nielsen Finance LLC,10% due 8/01/2014 (i)             1,474,875
    2,450,000   Universal City Florida Holding Co. I,10.11%
                   due 5/01/2010 (f)                                  2,535,750
                                                                 --------------
                                                                      6,732,587

Energy--Exploration & Production--2.0%

      200,000   Berry Petroleum Co., 8.25% due 11/01/2016               199,500
    1,500,000   Chaparral Energy, Inc., 8.50% due 12/01/2015          1,496,250
    1,580,000   Compton Petroleum Finance Corp., 7.625%
                   due 12/01/2013                                     1,548,400
    2,985,000   Sabine Pass LNG LP, 7.50% due 11/30/2016 (i)          2,985,000
      540,000   Stone Energy Corp., 8.11% due 7/15/2010 (f)(i)          540,675
                                                                 --------------
                                                                      6,769,825

Energy--Other--3.0%

    1,295,000   Aleris International, Inc., 9%
                   due 12/15/2014 (i)(m)                              1,372,700
      974,000   Dresser-Rand Group, Inc., 7.375%
                   due 11/01/2014                                       988,610
    5,000,000   Ocean RIG ASA, 9.36% due 4/04/2011 (f)                5,000,000
    3,025,000   SemGroup LP, 8.75% due 11/15/2015 (i)                 3,070,375
                                                                 --------------
                                                                     10,431,685



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Schedule of Investments (continued)                           (in U.S. dollars)


         Face
       Amount   Corporate Bonds                                        Value

Financial--2.5%

  $ 3,000,000   American Real Estate Partners LP, 7.125%
                   due 2/15/2013 (i)                             $    2,955,000
    4,000,000   Highland Legacy Ltd. CLO,11.621%
                   due 6/01/2011 (f)(i)                               4,016,000
      500,000   Investcorp SA, 7.54% due 10/21/2008                     507,402
      225,000   NCO Group, Inc.,10.23% due 11/15/2013 (f)(i)            226,125
    1,000,000   Pennant CBO Ltd.,13.43% due 3/14/2011 (i)               940,000
                                                                 --------------
                                                                      8,644,527

Gaming--4.1%

    5,925,000   CCM Merger, Inc., 8% due 8/01/2013 (i)                5,925,000
                Galaxy Entertainment Finance Co. Ltd. (i):
    1,025,000         10.354% due 12/15/2010 (f)                      1,086,500
      550,000         9.875% due 12/15/2012                             600,187
    1,210,000   Little Traverse Bay Bands of Odawa Indians,
                   10.25% due 2/15/2014 (i)                           1,246,300
      300,000   Penn National Gaming, Inc., 6.75%
                   due 3/01/2015                                        288,750
                Snoqualmie Entertainment Authority (i):
      500,000         9.15% due 2/01/2014 (f)                           507,500
      240,000         9.125% due 2/01/2015                              247,800
    1,000,000   Station Casinos, Inc., 7.75% due 8/15/2016            1,027,500
    1,750,000   Tropicana Entertainment, 9.625%
                   due 12/15/2014 (i)                                 1,760,938
    1,500,000   Tunica-Biloxi Gaming Authority, 9%
                   due 11/15/2015 (i)                                 1,593,750
                                                                 --------------
                                                                     14,284,225

Health Care--3.7%

    2,690,000   Angiotech Pharmaceuticals, Inc., 9.11%
                   due 12/01/2013 (f)(i)                              2,777,425
    1,875,000   CDRV Investors, Inc., 9.75% due 1/01/2015 (j)         1,504,687
    1,000,000   The Cooper Cos., Inc., 7.125% due 2/15/2015 (i)       1,010,000
                Elan Finance Plc:
    1,650,000         7.75% due 11/15/2011                            1,625,250
    2,325,000         9.36% due 11/15/2011 (f)                        2,365,687
    3,000,000   Tenet Healthcare Corp., 7.375% due 2/01/2013          2,805,000
      700,000   VWR International, Inc., 8% due 4/15/2014               710,500
                                                                 --------------
                                                                     12,798,549

Housing--4.1%

      500,000   CPG International I, Inc.,10.50% due 7/01/2013          523,750
    1,540,000   Esco Corp., 9.23% due 12/15/2013 (f)(i)               1,601,600
                Goodman Global Holding Co., Inc.:
    1,831,000         8.36% due 6/15/2012 (f)                         1,853,887
    4,750,000         7.875% due 12/15/2012                           4,845,000
    2,825,000   Masonite Corp.,11% due 4/06/2015 (i)                  2,817,937
    2,500,000   Technical Olympic USA, Inc., 8.25%
                   due 4/01/2011 (i)                                  2,425,000
                                                                 --------------
                                                                     14,067,174

Information Technology--4.7%

    3,800,000   Amkor Technology, Inc., 9.25% due 2/15/2008           3,876,000
      280,000   Compagnie Generale de Geophysique-Veritas,
                   7.75% due 5/15/2017                                  289,800
                Freescale Semiconductor, Inc. (i):
    3,710,000         9.125% due 12/15/2014 (m)                       3,761,012
      430,000         9.23% due 12/15/2014 (f)                          434,300
      240,000   Nortel Networks Ltd., 9.61% due 7/15/2011 (f)(i)        256,800



         Face
       Amount   Corporate Bonds                                        Value

Information Technology (concluded)

                SunGard Data Systems, Inc.:
  $ 4,675,000         9.125% due 8/15/2013                       $    4,990,563
    2,325,000         9.90% due 8/15/2013 (f)                         2,429,625
      270,000   Telcordia Technologies, Inc.,10%
                   due 3/15/2013 (i)                                    252,450
                                                                 --------------
                                                                     16,290,550

Leisure--0.5%

    2,000,000   True Temper Sports, Inc., 8.375% due 9/15/2011        1,790,000

Manufacturing--2.9%

    3,000,000   Communications & Power Industries, Inc., 8%
                   due 2/01/2012                                      3,097,500
    1,838,000   Invensys Plc, 9.875% due 3/15/2011 (i)                1,975,850
    1,320,000   Jarden Corp., 7.50% due 5/01/2017                     1,338,150
                NXP B.V. (i):
    1,110,000         8.11% due 10/15/2013 (f)                        1,134,975
      950,000         9.50% due 10/15/2015                              980,875
                RBS Global, Inc. (i):
      740,000         9.50% due 8/01/2014                               780,700
      835,000         8.875% due 9/01/2016                              851,700
                                                                 --------------
                                                                     10,159,750

Metal--Other--4.1%

                Indalex Holding Corp.:
    1,000,000         11.50% due 2/01/2014                            1,075,000
    2,950,000         11.50% due 2/01/2014 (i)                        3,156,500
    3,550,000   James River Coal Co., 9.375% due 6/01/2012            3,053,000
    4,530,000   Peabody Energy Corp., 7.375% due 11/01/2016           4,733,850
    2,225,000   RathGibson, Inc.,11.25% due 2/15/2014                 2,358,500
                                                                 --------------
                                                                     14,376,850

Packaging--1.9%

      100,000   Berry Plastics Holding Corp., 9.23%
                   due 9/15/2014 (f)                                    103,250
    4,285,000   Packaging Dynamics Finance Corp.,10%
                   due 5/01/2016 (i)                                  4,499,250
    2,000,000   Wise Metals Group LLC,10.25% due 5/15/2012            1,930,000
                                                                 --------------
                                                                      6,532,500

Paper--10.0%

    3,275,000   Abitibi-Consolidated, Inc., 8.855%
                   due 6/15/2011 (f)                                  3,291,375
                Ainsworth Lumber Co. Ltd. (f):
    4,975,000         9.11% due 10/01/2010                            4,203,875
    2,500,000         9.364% due 4/01/2013                            1,950,000
                Boise Cascade LLC:
    1,100,000         8.235% due 10/15/2012 (f)                       1,100,000
      350,000         7.125% due 10/15/2014                             343,000
    7,475,000   Bowater, Inc., 8.355% due 3/15/2010 (f)               7,549,816
    1,775,000   Domtar, Inc., 7.125% due 8/15/2015                    1,781,656
      215,000   Graphic Packaging International Corp., 9.50%
                   due 8/15/2013                                        229,244
    5,175,000   NewPage Corp.,11.61% due 5/01/2012 (f)                5,640,750
    5,150,000   Smurfit Kappa Funding Plc, 7.75%
                   due 4/01/2015                                      5,201,500
      800,000   Smurfit-Stone Container Enterprises, Inc.,
                   8.375% due 7/01/2012                                 816,000
                Verso Paper Holdings LLC (i):
    2,300,000         9.11% due 8/01/2014 (f)                         2,369,000
      250,000         11.375% due 8/01/2016                             268,750
                                                                 --------------
                                                                     34,744,966



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Schedule of Investments (continued)                           (in U.S. dollars)


         Face
       Amount   Corporate Bonds                                        Value

Retail--1.8%

  $ 1,780,000   Michaels Stores, Inc.,10% due 11/01/2014 (i)     $    1,904,600
                Neiman Marcus Group, Inc.:
    1,800,000         9% due 10/15/2015 (m)                           1,980,000
    2,000,000         10.375% due 10/15/2015                          2,240,000
                                                                 --------------
                                                                      6,124,600

Service--1.6%

    2,700,000   Ahern Rentals, Inc., 9.25% due 8/15/2013              2,828,250
    2,000,000   Neff Rental LLC,11.25% due 6/15/2012                  2,225,000
      550,000   PNA Intermediate Holding Corp.,12.36%
                   due 2/15/2013 (f)(i)                                 552,751
       60,000   Seitel Acquisition Corp., 9.75% due
                   2/15/2014 (i)                                         60,900
                                                                 --------------
                                                                      5,666,901

Telecommunications--2.8%

    1,045,000   Cincinnati Bell, Inc., 7.25% due 7/15/2013            1,084,187
    1,200,000   Nordic Telephone Co. Holdings ApS, 8.875%
                   due 5/01/2016 (i)                                  1,293,000
    4,000,000   Qwest Communications International, Inc.,
                   8.86% due 2/15/2009 (f)                            4,040,000
    1,025,000   Qwest Corp., 8.605% due 6/15/2013 (f)                 1,118,531
    2,000,000   Time Warner Telecom Holdings, Inc., 9.25%
                   due 2/15/2014                                      2,145,000
                                                                 --------------
                                                                      9,680,718

Transportation--0.3%

    1,000,000   Navios Maritime Holdings, Inc., 9.50%
                   due 12/15/2014 (i)                                 1,027,500

Utility--1.0%

      450,000   Conexant Systems, Inc., 9.11%
                   due 11/15/2010 (f)(i)                                463,500
    2,000,000   El Paso Performance-Linked Trust, 7.75%
                   due 7/15/2011 (i)                                  2,125,000
      210,000   Reliant Energy, Inc., 9.50% due 7/15/2013               227,588
      725,000   Williams Cos., Inc., 8.625% due 6/01/2010               765,781
                                                                 --------------
                                                                      3,581,869

Wireless Communications--0.5%

      310,000   Orascom Telecom Finance SCA, 7.875%
                   due 2/08/2014                                        308,450
    1,500,000   Rural Cellular Corp., 8.25% due 3/15/2012             1,556,250
                                                                 --------------
                                                                      1,864,700

                Total Corporate Bonds
                (Cost--$281,030,828)--80.9%                         281,000,753



                Floating Rate Loan Interests (l)

Aerospace & Defense--1.5%

      250,000   IAP Worldwide Services Inc. Term Loan, 9.688%
                   due 12/31/2012                                       250,469
      500,000   MRO Acquisitions Corp. First Lien Term Loan,
                   7.86% due 8/27/2010                                  504,688
    4,328,704   Standard Aero Holdings Inc. Term Loan,
                   7.57% - 7.61% due 8/24/2012                        4,347,642
                                                                 --------------
                                                                      5,102,799

Airlines--0.1%

      500,000   Delta Air Lines Debtor in Possession Term
                   Loan B, 10.098% due 3/16/2008                        502,292



         Face
       Amount   Floating Rate Loan Interests (l)                       Value

Automotive--5.6%

                Intermet Corp.:
  $   648,148         Letter of Credit,10.20% due 11/08/2010     $      541,204
    1,851,852         Term Loan D,10.353%
                      due 11/08/2010                                  1,546,296
    1,990,000   JL French Corp. First Lien Term Loan B,
                   8.375% due 6/05/2011                               1,939,006
    1,500,000   Keystone Automotive Operations Inc. Term
                   Loan, 8.82% due 1/15/2012                          1,511,250
                Metaldyne Corp.:
       57,692         Letter of Credit, 8.92% - 9.125%
                      due 1/15/2012                                      58,317
      418,269         Term Loan B, 9.125% due 1/15/2014                 422,800
                Navistar International Transportation Corp.:
    1,066,667         Revolving Credit, 5.22% - 8.61%
                      due 6/30/2012                                   1,084,267
    2,933,333         Term Loan B, 8.61% due 6/30/2012                2,981,733
    2,000,000   OshKosh Truck Corp. Term Loan B, 7.35%
                   due 11/30/2013                                     2,015,714
                Tenneco Automotive, Inc.:
    1,092,618         Term Loan B, 7.31% due 12/12/2010               1,096,442
      479,968         Tranche B-1, 7.322% due 12/12/2010                481,648
    1,075,227   United Components, Inc. Term Loan D, 7.61%
                   due 6/30/2012                                      1,080,603
    4,750,000   Visteon Corp. Term Loan, 8.38% due 6/13/2013          4,795,125
                                                                 --------------
                                                                     19,554,405

Broadcasting--1.1%

    4,000,000   Ellis Communications Term Loan, 10%
                   due 12/30/2011                                     3,990,000

Cable--U.S.--7.0%

                Cequel Communications:
    2,155,172         First Lien Term Loan, 7.61% due 11/05/2013      2,175,713
    4,279,840         Second Lien Term Loan,11.36%
                      due 5/04/2014                                   4,384,161
    8,000,000   Charter Communications, Inc. Term Loan,
                   7.985% due 4/28/2013                               8,051,504
    5,000,000   Insight Midwest Holdings LLC Delay Draw Term
                   Loan B, 7.36% due 4/03/2014                        5,046,250
    1,997,647   Mediacom Communications Term Loan D1,
                   6.87% - 7.27% due 1/31/2015                        1,998,896
    2,567,500   Mediacom LLC Tranche C Term Loan,
                   6.87% - 7.12% due 1/31/2015                        2,571,626
                                                                 --------------
                                                                     24,228,150

Chemicals--4.6%

    2,659,499   CII Carbon LLC Term Loan B, 7.375%
                   due 8/23/2012                                      2,672,797
    2,400,461   Celanese Holdings LLC Term Loan B, 7.37%
                   due 4/06/2011                                      2,417,120
    1,194,012   Huntsman ICI Holdings Term Loan B, 7.07%
                   due 8/16/2012                                      1,200,579
    1,568,000   Rockwood Specialties Group, Inc. Tranche E
                   Term Loan, 7.36% due 12/10/2012                    1,580,348
    8,000,000   Wellman, Inc. First Lien Term Loan, 9.36%
                   due 2/10/2009                                      8,016,664
                                                                 --------------
                                                                     15,887,508

Consumer--Non-Durables--0.8%

    1,193,749   Culligan International Co. Term Loan, 7.07%
                   due 9/30/2011                                      1,195,241
    1,455,000   Solo Cup Co. Term Loan, 8.82% due 2/27/2011           1,476,371
                                                                 --------------
                                                                      2,671,612



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Schedule of Investments (continued)                           (in U.S. dollars)


         Face
       Amount   Floating Rate Loan Interests (l)                       Value

Diversified Media--2.9%

  $ 2,000,000   Affinion Group Inc. Term Loan, 11.66%
                   due 3/01/2012                                 $    1,978,334
    3,000,000   Idearc Inc. Term Loan B, 7.33% due 11/15/2014         3,024,375
    3,491,250   Nielsen Finance LLC Term Loan, 8.125%
                   due 8/15/2013                                      3,522,706
      750,000   Penton Media Term Loan, 7.625% due 2/15/2013            756,875
      870,000   Riverdeep Group Ltd. Bridge Loan, 11.066%
                   due 12/21/2007                                       867,825
                                                                 --------------
                                                                     10,150,115

Energy--Exploration & Production--1.9%

    6,000,000   Frontier Drilling Term Loan, 8.62% - 8.68%
                   due 6/21/2013                                      6,000,000
      496,250   MEG Energy Corp. Term Loan, 7.375%
                   due 4/03/2013                                        499,429
                                                                 --------------
                                                                      6,499,429

Energy--Other--2.3%

                Alon USA, Inc.:
      331,667         Term Loan, 7.57% due 6/22/2013                    333,532
    2,653,333         Term Loan B, 7.57% - 7.931%
                      due 6/22/2013                                   2,668,258
      330,000   Exco Resources, Inc. Term Loan,
                   11.375% -11.438% due 10/31/2011                      332,888
    2,475,000   Key Energy Services, Inc. Term Loan C,
                   7.86% -7.864% due 6/30/2012                        2,490,469
    2,000,000   Scorpion Drilling Ltd. Second Lien Term
                   Loan, 13.61% due 5/05/2015                         2,060,000
                                                                 --------------
                                                                      7,885,147

Financial--1.2%

    4,250,000   JG Wentworth Manufacturing Term Loan, 8.867%
                   due 4/12/2011                                      4,292,500

Food & Tobacco--5.0%

                Aramark Corp.:
      329,207         Letter of Credit, 7.445% due 1/30/2014            332,458
    4,670,793         Term Loan B, 7.47% due 1/30/2014                4,716,916
      750,000   Bolthouse Farms, Inc. Second Lien Term Loan,
                   10.864% due 2/16/2013                                758,125
    1,843,049   Commonwealth Brands Inc. Term Loan, 7.625%
                   due 12/22/2012                                     1,849,960
                Dole Food Co., Inc.:
      558,777         Letter of Credit, 5.23% due 4/12/2013             559,056
    1,247,818         Tranche B Term Loan, 7.438% - 9.25%
                      due 4/12/2013                                   1,248,442
    4,159,394         Tranche C Term Loan, 7.438% - 9.25%
                      due 4/04/2013                                   4,161,473
      997,494   Eight O'Clock Coffee Term Loan, 8.125%
                   due 7/21/2012                                        997,494
    1,414,315   Pierre Foods, Inc. Term Loan B, 9.50%
                   due 6/30/2010                                      1,421,386
      995,000   Quiznos LLC First Lien Term Loan, 7.63%
                   due 5/05/2013                                        999,000
      250,000   Sturm Foods Inc. Term Loan, 7.875%
                   due 1/30/2014                                        250,938
                                                                 --------------
                                                                     17,295,248

Gaming--1.5%

    1,500,000   Edge-Star Partners LLC First Lien Term Loan,
                   9.36% due 11/18/2007                               1,500,000
      750,000   Greenwood Racing, Inc. Term Loan, 7.57%
                   due 11/28/2011                                       755,625



         Face
       Amount   Floating Rate Loan Interests (l)                       Value

Gaming (concluded)

  $ 3,000,000   Venetian Macau U.S. Finance Co. LLC Term
                   Loan B, 8.12% due 5/25/2013                   $    3,030,375
                                                                 --------------
                                                                      5,286,000

Health Care--2.0%

      498,750   Community Health Systems, Inc. Term Loan,
                   7.11% due 12/15/2013                                 501,166
    1,107,600   DaVita, Inc. Term Loan, 6.82% due 7/30/2012           1,113,415
    2,000,000   Health Management Associates, Inc. Term
                   Loan B, 7.07% due 1/15/2014                        2,014,376
      498,750   Sterigenics International, Inc. Term Loan,
                   7.86% due 11/30/2013                                 499,685
    2,959,463   VWR International, Inc. Term Loan B, 7.61%
                   due 4/07/2011                                      2,979,809
                                                                 --------------
                                                                      7,108,451

Housing--2.6%

    1,476,562   Headwaters, Inc. First Lien Term Loan B-1,
                   7.32% due 4/30/2011                                1,479,331
    5,000,000   LNR Property Corp. Term Loan B, 8.11%
                   due 7/12/2011                                      5,029,465
    2,500,000   Ply Gem Industries, Inc. First Lien Term
                   Loan, 11.12% due 10/31/2011                        2,528,125
                                                                 --------------
                                                                      9,036,921

Information Technology--3.3%

    1,638,379   Activant Solutions Term Loan, 7.375%
                   due 5/02/2013                                      1,639,403
    1,000,000   ClientLogic Holding Corp. Term Loan,
                   7.82% - 7.86% due 1/30/2014                        1,005,417
    1,995,000   Dealer Comp Services Term Loan, 7.845%
                   due 10/31/2012                                     2,013,526
      500,000   Intergraph Corp. Term Loan, 7.87%
                   due 5/15/2014                                        503,438
                RedPrairie Corp. Term Loan:
      699,248         8.375% - 10.25% due 7/31/2012                     699,248
      300,000         8.375% due 1/31/2013                              303,000
    3,000,000   Sanmina-SCI Corp. Term Loan, 7.875%
                   due 1/30/2008                                      3,012,000
      500,000   SunGard Data Systems, Inc. Term Loan B,
                   7.36% due 2/28/2014                                  504,727
    1,657,969   Telcordia Technologies, Inc. Term Loan,
                   8.12% due 9/15/2012                                1,637,763
                                                                 --------------
                                                                     11,318,522

Leisure--1.3%

    2,985,000   Cedar Fair LP Term Loan, 7.32%
                   due 8/30/2012                                      3,013,358
    1,500,000   National Cinemedia LLC Term Loan B, 7.09%
                   due 2/28/2015                                      1,511,250
                                                                 --------------
                                                                      4,524,608

Manufacturing--2.7%

      500,000   Brand Energy Letter of Credit, 7.705%
                   due 2/15/2014                                        503,125
    1,000,000   Harrington Holdings, Inc. Term Loan, 7.82%
                   due 1/15/2014                                      1,007,500
                Invensys Plc:
    1,529,412         Term Loan, 7.446% due 12/15/2010                1,538,971
    1,720,588         Term Loan, 7.36% due 1/15/2011                  1,731,342
    1,240,272   John Maneely Co. Term Loan B,
                   8.595% - 10.50% due 12/15/2013                     1,253,967



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Schedule of Investments (continued)                           (in U.S. dollars)


         Face
       Amount   Floating Rate Loan Interests (l)                       Value

Manufacturing (concluded)

  $ 3,393,589   Metokote Corp. First Lien Term Loan,
                   8.32% - 8.74% due 11/27/2011                  $    3,385,105
                                                                 --------------
                                                                      9,420,010

Metal--Other--1.4%

                Euramax International Plc:
    1,700,843         First Lien International Term Loan B,
                      7.875% due 6/29/2012                            1,705,946
    3,000,000         Second Lien Term Loan,12.36%
                      due 6/29/2013                                   3,011,250
                                                                 --------------
                                                                      4,717,196

Packaging--1.1%

    1,822,907   Anchor Glass Container Corp. Term Loan B,
                   7.61% - 7.614% due 5/03/2013                       1,818,350
    2,000,000   Graham Packaging Co. LP Tranche B Term
                   Loan, 9.625% due 4/07/2012                         2,018,000
                                                                 --------------
                                                                      3,836,350

Retail--0.3%

      500,000   Burlington Coat Factory Warehouse Corp. Term
                   Loan, 7.61% due 4/15/2013                            500,209
      174,601   General Nutrition Centers, Inc. Tranche B
                   Term Loan, 8.07% due 12/05/2009                      175,255
      500,000   Petco Animal Supplies, Inc. Term Loan, 8.10%
                   due 10/31/2012                                       505,521
                                                                 --------------
                                                                      1,180,985

Service--4.0%

                Allied Waste North America, Inc.:
      382,057         Credit Linked Deposit, 5.322%
                      due 1/15/2012                                     384,604
      860,451         Term Loan, 7.12% - 7.21% due 1/15/2012            865,758
      800,000   Brickman Group, Inc. Term Loan,
                   7.36% - 7.399% due 1/23/2014                         803,500
    1,000,000   Brock Holdings Term Loan, 7.32% due 2/28/2014         1,009,688
    2,000,000   NES Rentals Holdings, Inc. Term Loan C,12.125%
                   due 7/20/2013                                      2,012,500
                United Rentals, Inc.:
      734,224         Term Loan, 7.32% due 2/14/2011                    742,025
      333,333         Tranche B Credit Linked Deposit, 5.322%
                      due 2/14/2011                                     336,875
    7,549,200   Waste Services, Inc. Term Loan D,
                   8.06% - 8.07% due 3/31/2011                        7,634,129
                                                                 --------------
                                                                     13,789,079

Steel--0.1%

      500,000   McJunkin Corp. Term Loan B, 7.595%
                   due 1/30/2014                                        505,000

Telecommunications--0.7%

    1,702,542   Winstar Communications Debtor In Possession,
                   6.366% due 12/31/2006 (b)                          2,289,919

Utility--0.6%

    1,500,000   Calpine Corp. Second Priority Debtor in Possession
                   Term Loan, 9.364% due 12/20/2007                   1,512,500
      742,500   Generac Portable Products, Inc. Term
                   Loan, 7.86% due 11/15/2013                           743,892
                                                                 --------------
                                                                      2,256,392

Wireless Communications--1.4%

    2,750,000   Centennial Cellular Operating Co. Term Loan,
                   7.36% - 7.614% due 2/09/2011                       2,774,063



         Face
       Amount   Floating Rate Loan Interests (l)                       Value

Wireless Communications (concluded)

  $ 2,000,000   West Corp. Term Loan, 7.763% - 8.11%
                   due 10/31/2013                                $    2,016,388
                                                                 --------------
                                                                      4,790,451

                Total Floating Rate Loan Interests
                (Cost--$195,125,425)--57.0%                         198,119,089



       Shares
         Held   Common Stocks

Chemicals--0.0%

      142,466   GEO Specialty Chemicals, Inc. (e)                       142,466

Leisure--0.2%

       41,866   Lodgian, Inc. (e)                                       560,167

                Total Common Stocks
                (Cost--$2,818,936)--0.2%                                702,633



                Warrants (g)

Paper--0.0%

        3,500   MDP Acquisitions Plc (expires 10/01/2013)                70,000

Wireless Communications--0.1%

          600   American Tower Corp. (expires 8/01/2008)                326,274

                Total Warrants
                (Cost--$39,036)--0.1%                                   396,274



   Beneficial
     Interest   Other Interests (d)

Automotive--0.0%

  $ 4,130,972   Cambridge Industries, Inc. (Litigation Trust
                   Certificates)                                              0

Cable--U.S.--0.0%

      250,000   Adelphia C.V.U. Series ACC-6B                                 0

Health Care--0.0%

       10,284   MEDIQ Inc. (Preferred Stock Escrow
                   due 2/01/2006)                                             0

                Total Other Interests
                (Cost--$25)--0.0%                                             0




                Short-Term Securities

  $ 4,850,625   BlackRock Liquidity Series, LLC
                   Cash Sweep Series, 5.33% (a)(k)                    4,850,625

                Total Short-Term Securities
                (Cost--$4,850,625)--1.4%                              4,850,625

Total Investments (Cost--$483,864,875*)--139.6%                     485,069,374
Liabilities in Excess of Other Assets--(39.6%)                    (137,620,337)
                                                                 --------------
Net Assets--100.0%                                               $  347,449,037
                                                                 ==============



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Schedule of Investments (concluded)                           (in U.S. dollars)


  * The cost and unrealized appreciation (depreciation) of investments
    as of February 28, 2007, as computed for federal income tax purposes,
    were as follows:

    Aggregate cost                                 $    483,590,985
                                                   ================
    Gross unrealized appreciation                  $     12,795,332
    Gross unrealized depreciation                      (11,316,943)
                                                   ----------------
    Net unrealized appreciation                    $      1,478,389
                                                   ================

(a) Represents the current yield as of February 28, 2007.

(b) As a result of bankruptcy proceedings, the company did not repay the
    principal amount of the security upon maturity and is non-income
    producing.

(c) Non-income producing security; issuer filed for bankruptcy or is in
    default of interest payments.

(d) Other interests represent beneficial interest in liquidation trusts
    and other reorganization entities and are non-income producing.

(e) Non-income producing security.

(f) Floating rate security.

(g) Warrants entitle the Fund to purchase a predetermined number of shares
    of common stock and are non-income producing. The purchase price and
    number of shares are subject to adjustment under certain conditions
    until the expiration date.

(h) Convertible security.

(i) The security may be offered and sold to "qualified institutional buyers"
    under Rule 144A of the Securities Act of 1933.

(j) Represents a step-up bond; the interest rate shown is the effective
    yield at the time of purchase.

(k) Investments in companies considered to be an affiliate of the Fund,
    for purposes of Section 2(a)(3) of the Investment Company Act of 1940,
    were as follows:

                                                  Net            Interest
    Affiliate                                   Activity          Income

    BlackRock Liquidity Series, LLC
      Cash Sweep Series                        $4,850,625        $248,110


(l) Floating rate loan interests in which the Fund invests generally pay
    interest at rates that are periodically redetermined by reference to a
    base lending rate plus a premium. The base lending rates are generally
    (i) the lending rate offered by one or more major European banks, such
    as London InterBank Offered Rate ("LIBOR"), (ii) the prime rate offered
    by one or more U.S. banks, or (iii) the certificate of deposit rate.

(m) Represents a pay-in-kind security which may pay interest/dividends in
    additional face/shares.

  o For Fund compliance purposes, the Fund's industry classifications
    refer to any one or more of the industry sub-classifications used by
    one or more widely recognized market indexes or ratings group indexes,
    and/or as defined by Fund management. This definition may not apply for
    purposes of this report, which may combine industry sub-classifications
    for reporting ease. Industries are shown as a percent of net assets.
    These industry classifications are unaudited.

  o Swaps outstanding as of February 28, 2007 were as follows:


                                                    Notional      Unrealized
                                                     Amount      Depreciation

    Sold credit default protection on
    Ford Motor Credit Company and receive 2.05%

    Broker, Deutsche Bank AG London
    Expires March 2010                             $5,000,000     $(28,590)

    See Notes to Financial Statements.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Statement of Assets, Liabilities and Capital


As of February 28, 2007
                                                                                                         
Assets

       Investments in unaffiliated securities, at value (identified cost--$479,014,250)                           $   480,218,749
       Investments in affiliated securities, at value (identified cost--$4,850,625)                                     4,850,625
       Cash                                                                                                               519,714
       Receivables:
           Interest                                                                            $     7,135,616
           Securities sold                                                                           1,350,455
           Principal paydowns                                                                           56,891
           Swaps                                                                                        15,375
           Commitment fees                                                                               8,243          8,566,580
                                                                                               ---------------
       Prepaid expenses and other assets                                                                                    5,858
                                                                                                                  ---------------
       Total assets                                                                                                   494,161,526
                                                                                                                  ---------------

Liabilities

       Loans                                                                                                          132,000,000
       Unrealized depreciation on swaps                                                                                    28,590
       Unfunded loan committment                                                                                            2,656
       Payables:
           Securities purchased                                                                     14,256,878
           Investment adviser                                                                          189,883
           Interest on loans                                                                            85,646
           Other affiliates                                                                              2,685         14,535,092
                                                                                               ---------------
       Accrued expenses and other liabilities                                                                             146,151
                                                                                                                  ---------------
       Total liabilities                                                                                              146,712,489
                                                                                                                  ---------------

Net Assets

       Net assets                                                                                                 $   347,449,037
                                                                                                                  ===============

Capital

       Common Stock, par value $.10 per share; 200,000,000 shares authorized
       (56,274,149 shares issued and outstanding)                                                                 $     5,627,415
       Paid-in capital in excess of par                                                                               491,049,598
       Undistributed investment income--net                                                    $     2,511,696
       Accumulated realized capital losses--net                                                  (152,913,868)
       Unrealized appreciation--net                                                                  1,174,196
                                                                                               ---------------
       Total accumulated losses--net                                                                                (149,227,976)
                                                                                                                  ---------------
       Total capital--Equivalent to $6.17 net asset value per share of Common Stock
       (market price--$6.53)                                                                                      $   347,449,037
                                                                                                                  ===============

       See Notes to Financial Statements.




BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Statement of Operations


For the Year Ended February 28, 2007
                                                                                                         
Investment Income

       Interest (including $248,110 from affiliates)                                                              $    41,691,336
       Facility and other fees                                                                                            391,982
                                                                                                                  ---------------
       Total income                                                                                                    42,083,318
                                                                                                                  ---------------

Expenses

       Loan interest expense                                                                   $     7,210,034
       Investment advisory fees                                                                      2,348,661
       Borrowing costs                                                                                 194,906
       Accounting services                                                                             123,521
       Professional fees                                                                                85,934
       Transfer agent fees                                                                              75,960
       Directors' fees and expenses                                                                     43,879
       Printing and shareholder reports                                                                 42,877
       Listing fees                                                                                     35,059
       Custodian fees                                                                                   33,917
       Pricing services                                                                                 22,484
       Other                                                                                            21,877
                                                                                               ---------------
       Total expenses                                                                                                  10,239,109
                                                                                                                  ---------------
       Investment income--net                                                                                          31,844,209
                                                                                                                  ---------------

Realized & Unrealized Gain (Loss)--Net

       Realized gain (loss) on:
           Investments--net                                                                        (1,598,672)
           Swaps--net                                                                                   15,375        (1,583,297)
                                                                                               ---------------
       Change in unrealized appreciation/depreciation on:
           Investments--net                                                                         11,128,194
           Unfunded corporate loans--net                                                              (15,777)
           Swaps--net                                                                                 (28,590)         11,083,827
                                                                                               ---------------    ---------------
       Total realized and unrealized gain--net                                                                          9,500,530
                                                                                                                  ---------------
       Net Increase in Net Assets Resulting from Operations                                                       $    41,344,739
                                                                                                                  ===============

       See Notes to Financial Statements.




BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Statements of Changes in Net Assets


                                                                                                      For the Year Ended
                                                                                                         February 28,
Increase (Decrease) in Net Assets:                                                                   2007              2006
                                                                                                         
Operations

       Investment income--net                                                                  $    31,844,209    $    30,664,950
       Realized gain (loss)--net                                                                   (1,583,297)            246,957
       Change in unrealized appreciation/depreciation--net                                          11,083,827       (14,723,000)
                                                                                               ---------------    ---------------
       Net increase in net assets resulting from operations                                         41,344,739         16,188,907
                                                                                               ---------------    ---------------

Dividends to Shareholders

       Dividends to shareholders from investment income--net                                      (31,608,871)       (31,484,794)
                                                                                               ---------------    ---------------

Stock Transactions

       Value of shares issued to Common Stock shareholders in reinvestment of dividends              2,023,099          1,195,046
                                                                                               ---------------    ---------------
       Net increase in net assets resulting from stock transactions                                  2,023,099          1,195,046
                                                                                               ---------------    ---------------

Net Assets

       Total increase (decrease) in net assets                                                      11,758,967       (14,100,841)
       Beginning of year                                                                           335,690,070        349,790,911
                                                                                               ---------------    ---------------
       End of year*                                                                            $   347,449,037    $   335,690,070
                                                                                               ===============    ===============
           * Undistributed investment income--net                                              $     2,511,696    $     2,276,358
                                                                                               ===============    ===============

           See Notes to Financial Statements.




BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Statement of Cash Flows


For the Year Ended February 28, 2007
                                                                                                            
Cash Provided by Operating Activities

       Net increase in net assets resulting from operations                                                       $    41,344,739
       Adjustments to reconcile net increase in net assets resulting from operations to net cash
       provided by operating activities:
           Decrease in other receivables                                                                                  181,173
           Increase in prepaid expenses and other assets                                                                  (1,334)
           Increase in other liabilities                                                                                   98,167
           Realized and unrealized gain--net                                                                          (8,874,024)
           Amortization of premium and discount                                                                         (589,736)
       Proceeds from sales and paydowns of long-term securities                                                       292,383,252
       Purchases of long-term securities                                                                            (279,507,042)
       Net purchases of short-term investments                                                                        (4,850,625)
                                                                                                                  ---------------
       Cash provided by operating activities                                                                           40,184,570
                                                                                                                  ---------------

Cash Used for Financing Activities

       Cash receipts from borrowings                                                                                  159,200,000
       Cash payments on borrowings                                                                                  (168,900,000)
       Dividends paid to shareholders                                                                                (29,768,181)
       Decrease in bank overdraft                                                                                       (196,675)
                                                                                                                  ---------------
       Cash used for financing activities                                                                            (39,664,856)
                                                                                                                  ---------------

Cash

       Net increase in cash                                                                                               519,714
       Cash at beginning of year                                                                                                0
                                                                                                                  ---------------
       Cash at end of year                                                                                        $       519,714
                                                                                                                  ===============

Cash Flow Information

       Cash paid for interest                                                                                     $     7,198,513
                                                                                                                  ===============

Non-Cash Financing Activities

       Value of capital shares issued on reinvestment of dividends to shareholders                                $     2,023,099
                                                                                                                  ===============

       See Notes to Financial Statements.




BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Financial Highlights


                                                                                                       For the       For the
                                                                         For the Year Ended           Year Ended    Year Ended
The following per share data and ratios have been derived                   February 28,             February 29,  February 28,
from information provided in the financial statements.           2007           2006         2005        2004          2003
                                                                                                       
Per Share Operating Performance

Net asset value, beginning of year                            $      6.00   $      6.28   $      6.10   $      4.82   $      5.40
                                                              -----------   -----------   -----------   -----------   -----------
Investment income--net**                                              .57           .55           .57           .62           .63
Realized and unrealized gain (loss)--net                              .16         (.27)           .16          1.30         (.59)
                                                              -----------   -----------   -----------   -----------   -----------
Total from investment operations                                      .73           .28           .73          1.92           .04
                                                              -----------   -----------   -----------   -----------   -----------
Less dividends from investment income--net                          (.56)         (.56)         (.55)         (.64)         (.62)
                                                              -----------   -----------   -----------   -----------   -----------
Net asset value, end of year                                  $      6.17   $      6.00   $      6.28   $      6.10   $      4.82
                                                              ===========   ===========   ===========   ===========   ===========
Market price per share, end of year                           $      6.53   $      5.88   $      6.21   $      6.11   $      5.45
                                                              ===========   ===========   ===========   ===========   ===========

Total Investment Return*

Based on net asset value per share                                 12.82%         5.07%        12.88%        41.49%         1.18%
                                                              ===========   ===========   ===========   ===========   ===========
Based on market price per share                                    21.84%         4.13%        11.44%        25.34%         4.88%
                                                              ===========   ===========   ===========   ===========   ===========

Ratios to Average Net Assets

Expenses, excluding interest expense                                 .90%          .91%          .91%          .90%          .97%
                                                              ===========   ===========   ===========   ===========   ===========
Expenses                                                            3.03%         2.39%         1.69%         1.42%         1.78%
                                                              ===========   ===========   ===========   ===========   ===========
Investment income--net                                              9.42%         9.23%         9.28%        11.23%        12.75%
                                                              ===========   ===========   ===========   ===========   ===========

Leverage

Amount of borrowings, end of year (in thousands)              $   132,000   $   141,700   $   147,500   $   132,297   $   104,600
                                                              ===========   ===========   ===========   ===========   ===========
Average amount of borrowings outstanding during
the year (in thousands)                                       $   131,575   $   128,461  $    137,934   $   112,037   $   110,348
                                                              ===========   ===========   ===========   ===========   ===========
Average amount of borrowings outstanding per
share during the year**                                       $      2.35   $      2.30   $      2.48   $      2.02   $      2.02
                                                              ===========   ===========   ===========   ===========   ===========

Supplemental Data

Net assets, end of year (in thousands)                        $   347,449   $   335,690   $   349,791   $   339,950   $   265,423
                                                              ===========   ===========   ===========   ===========   ===========
Portfolio turnover                                                 62.27%        48.41%        54.18%        63.78%        74.70%
                                                              ===========   ===========   ===========   ===========   ===========

      * Total investment returns based on market price, which can be significantly greater or lesser than
        the net asset value, may result in substantially different returns. Total investment returns exclude
        the effects of sales charges.

     ** Based on average shares outstanding.

        See Notes to Financial Statements.




BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Notes to Financial Statements


1. Significant Accounting Policies:
On September 29, 2006, Senior High Income Portfolio, Inc. was renamed
BlackRock Senior High Income Fund, Inc. (the "Fund"). The Fund is registered
under the Investment Company Act of 1940, as amended, as a non-diversified,
closed-end management investment company. The Fund's financial statements are
prepared in conformity with U.S. generally accepted accounting principles,
which may require the use of management accruals and estimates. Actual results
may differ from these estimates. The Fund determines and makes available for
publication the net asset value of its Common Stock on a daily basis. The
Fund's Common Stock shares are listed on the New York Stock Exchange ("NYSE")
under the symbol ARK.

(a) Corporate debt obligations--The Fund invests principally in senior debt
obligations of companies, including floating rate loans made by banks and
other financial institutions and both privately and publicly offered corporate
bonds and notes. Because agents and intermediaries are primarily commercial
banks or other financial institutions, the Fund's investment in floating rate
loans could be considered concentrated in financial institutions.

(b) Valuation of investments--Floating rate loans are valued in accordance
with guidelines established by the Fund's Board of Directors. As of October 2,
2006, floating rate loan interests are valued at the mean between the last
available bid prices from one or more brokers or dealers as obtained from Loan
Pricing Corporation. Previously floating rate loan interests were valued at
the mean between the last available bid and asked prices as obtained from the
same pricing source. This change had no significant effect on the valuation of
these loans. For the limited number of floating rate loans for which no
reliable price quotes are available, such floating rate loans will be valued
by Loan Pricing Corporation through the use of pricing matrixes to determine
valuations. If the pricing service does not provide a value for a floating
rate loan, Blackrock Advisors, LLC (the "Manager"), an indirect, wholly owned
subsidiary of BlackRock, Inc., will value the floating rate loan at fair
value, which is intended to approximate market value.

Debt securities are traded primarily in the over-the-counter ("OTC") markets
and are valued at the last available bid price in the OTC market or on the
basis of values as obtained by a pricing service. Pricing services use
valuation matrixes that incorporate both dealer-supplied valuations and
valuation models. The procedures of the pricing service and its valuations are
reviewed by the officers of the Fund under the general direction of the Board
of Directors. Such valuations and procedures will be reviewed periodically by
the Board of Directors of the Fund.

Securities that are held by the Fund that are traded on stock exchanges or the
NASDAQ Global Market are valued at the last sale price or official close price
on the exchange on which such securities are traded, as of the close of
business on the day the securities are being valued or, lacking any sales, at
the last available bid price for long positions, and at the last available
asked price for short positions. In cases where securities are traded on more
than one exchange, the securities are valued on the exchange designated as the
primary market by or under the authority of the Board of Directors of the
Fund. Long positions in securities traded in the OTC market, NASDAQ Capital
Market or Bulletin Board are valued at the last available bid price or yield
equivalent obtained from one or more dealers or pricing services approved by
the Board of Directors of the Fund. Short positions in securities traded in
the OTC market are valued at the last available asked price. Portfolio
securities that are traded both in the OTC market and on a stock exchange are
valued according to the broadest and most representative market. When the Fund
writes an option, the amount of the premium received is recorded on the books
of the Fund as an asset and an equivalent liability. The amount of the
liability is subsequently valued to reflect the current market value of the
option written, based on the last sale price in the case of exchange-traded
options or, in the case of options traded in the OTC market, the last asked
price. Options purchased by the Fund are valued at their last sale price in
the case of exchange-traded options or, in the case of options traded in the
OTC market, the last bid price. Swap agreements are valued based upon quoted
fair valuations received daily by the Fund from a pricing service or
counterparty. Other investments, including financial futures contracts and
related options, are stated at market value. Obligations with remaining
maturities of 60 days or less are valued at amortized cost unless the Manager
believes that this method no longer produces fair valuations. Valuation of
other short-term investment vehicles is generally based on the net asset value
of the underlying vehicle or amortized cost. Repurchase agreements will be
valued at cost plus accrued interest.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Notes to Financial Statements (continued)


Generally, trading in foreign securities, as well as U.S. government
securities, money market instruments and certain fixed income securities, is
substantially completed each day at various times prior to the close of
business on the NYSE. The values of such securities used in computing the net
asset value of the Fund's shares are determined as of such times. Foreign
currency exchange rates will generally be determined as of the close of
business on the NYSE. Occasionally, events affecting the values of such
securities and such exchange rates may occur between the times at which they
are determined and the close of business on the NYSE that may not be reflected
in the computation of the Fund's net asset value. If events (for example, a
company announcement, market volatility or a natural disaster) occur during
such periods that are expected to materially affect the value of such
securities, those securities will be valued at their fair value as determined
in good faith by the Fund's Board of Directors or by the Manager using a
pricing service and/or procedures approved by the Fund's Board of Directors.

(c) Derivative financial instruments--The Fund may engage in various portfolio
investment strategies both to increase the return of the Fund and to hedge, or
protect, its exposure to interest rate movements and movements in the
securities markets. Losses may arise due to changes in the value of the
contract or if the counterparty does not perform under the contract.

* Financial futures contracts--The Fund may purchase or sell financial futures
contracts and options on such financial futures contracts for the purpose of
hedging the market risk on existing securities or the intended purchase of
securities. Financial futures contracts are contracts for delayed delivery of
securities at a specific future date and at a specific price or yield. Upon
entering into a contract, the Fund deposits and maintains as collateral such
initial margin as required by the exchange on which the transaction is
effected. Pursuant to the contract, the Fund agrees to receive from or pay to
the broker an amount of cash equal to the daily fluctuation in value of the
contract. Such receipts or payments are known as variation margin and are
recorded by the Fund as unrealized gains or losses. When the contract is
closed, the Fund records a realized gain or loss equal to the difference
between the value of the contract at the time it was opened and the value at
the time it was closed.

* Options--The Fund may write and purchase call and put options. When the Fund
writes an option, an amount equal to the premium received by the Fund is
reflected as an asset and an equivalent liability. The amount of the liability
is subsequently marked-to-market to reflect the current market value of the
option written. When a security is purchased or sold through an exercise of an
option, the related premium paid (or received) is added to (or deducted from)
the basis of the security acquired or deducted from (or added to) the proceeds
of the security sold. When an option expires (or the Fund enters into a
closing transaction), the Fund realizes a gain or loss on the option to the
extent of the premiums received or paid (or gain or loss to the extent the
cost of the closing transaction is less than or exceeds the premiums paid or
received).

Written and purchased options are non-income producing investments.

* Swaps--The Fund may enter into swap agreements, which are OTC contracts in
which the Fund and a counterparty agree to make periodic net payments on a
specified notional amount. The net payments can be made for a set period of
time or may be triggered by a predetermined credit event. The net periodic
payments may be based on a fixed or variable interest rate; the change in
market value of a specified security, basket of securities, or index; or the
return generated by a security. These periodic payments received or made by
the Fund are recorded in the accompanying Statement of Operations as realized
gains or losses, respectively. Gains or losses are also realized upon
termination of the swap agreements. Swaps are marked-to-market daily and
changes in value are recorded as unrealized appreciation (depreciation). Risks
include changes in the returns of the underlying instruments, failure of the
counterparties to perform under the contracts' terms and the possible lack of
liquidity with respect to the swap agreements.

(d) Income taxes--It is the Fund's policy to comply with the requirements of
the Internal Revenue Code applicable to regulated investment companies and to
distribute substantially all of its taxable income to its shareholders.
Therefore, no federal income tax provision is required.

(e) Recent accounting pronouncements--In July 2006, the Financial Accounting
Standards Board ("FASB") issued Interpretation No. 48 ("FIN 48"), "Accounting
for Uncertainty in Income Taxes - an interpretation of FASB Statement No.
109." FIN 48 prescribes the minimum recognition threshold a tax position must
meet in connection with accounting for uncertainties in income tax positions
taken or expected to be taken by an entity, including mutual funds, before
being measured and recognized in the financial statements. Adoption of FIN 48
is required for the last net asset value calculation in the first required
financial statement reporting period for fiscal years beginning after December
15, 2006. The impact on the Fund's financial statements, if any, is currently
being assessed.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Notes to Financial Statements (continued)


In September 2006, Statement of Financial Accounting Standards No. 157, "Fair
Value Measurements" ("FAS 157"), was issued and is effective for fiscal years
beginning after November 15, 2007. FAS 157 defines fair value, establishes a
framework for measuring fair value and expands disclosures about fair value
measurements. At this time, management is evaluating the implications of FAS
157 and its impact on the Fund's financial statements, if any, has not been
determined.

In addition, in February 2007, FASB issued "Statement of Financial Accounting
Standards No. 159, The Fair Value Option for Financial Assets and Financial
Liabilities" ("FAS 159"), which is effective for fiscal years beginning after
November 15, 2007. Early adoption is permitted as of the beginning of a fiscal
year that begins on or before November 15, 2007, provided the entity also
elects to apply the provisions of FAS 157. FAS 159 permits entities to choose
to measure many financial instruments and certain other items at fair value
that are not currently required to be measured at fair value. FAS 159 also
establishes presentation and disclosure requirements designed to facilitate
comparisons between entities that choose different measurement attributes for
similar types of assets and liabilities. At this time, management is
evaluating the implications of FAS 159 and its impact on the Fund's financial
statements, if any, has not been determined.

(f) Security transactions and investment income--Security transactions are
recorded on the dates the transactions are entered into (the trade dates).
Realized gains and losses on security transactions are determined on the
identified cost basis. Interest income is recognized on the accrual basis. The
Fund amortizes all premiums and discounts on debt securities.

(g) Dividends and distributions--Dividends from net investment income are
declared and paid monthly. Distributions of capital gains are recorded on the
ex-dividend dates. The Fund may at times pay out less than the entire amount
of net investment income earned in any particular period and may at times pay
out such accumulated undistributed income in other periods to permit the Fund
to maintain a more stable level of dividends.

(h) Securities lending--The Fund may lend securities to financial institutions
that provide cash or securities issued or guaranteed by the U.S. government as
collateral, which will be maintained at all times in an amount equal to at
least 100% of the current market value of the loaned securities. The market
value of the loaned securities is determined at the close of business of the
Fund and any additional required collateral is delivered to the Fund on the
next business day. Where the Fund receives securities as collateral for the
loaned securities, it receives a fee from the borrower. The Fund typically
receives the income on the loaned securities, but does not receive the income
on the collateral. Where the Fund receives cash collateral, it may invest such
collateral and retain the amount earned on such investment, net of any amount
rebated to the borrower. Loans of securities are terminable at any time and
the borrower, after notice, is required to return borrowed securities within
five business days. The Fund may pay reasonable finder's, lending agent,
administrative and custodial fees in connection with its loans. In the event
that the borrower defaults on its obligation to return borrowed securities
because of insolvency or for any other reason, the Fund could experience
delays and costs in gaining access to the collateral. The Fund also could
suffer a loss where the value of the collateral falls below the market value
of the borrowed securities, in the event of borrower default or in the event
of losses on investments made with cash collateral.

(i) Reclassification--U.S. generally accepted accounting principles require
that certain components of net assets be adjusted to reflect permanent
differences between financial and tax reporting. Accordingly, during the
current year, $4,282,847 has been reclassified between paid-in capital in
excess of par and accumulated net realized capital losses as a result of a
permanent difference attributable to the expiration of capital loss
carryforwards. This reclassification has no effect on net assets or net asset
values per share.


2. Investment Advisory Agreement and Transactions with Affiliates:
On September 29, 2006, BlackRock, Inc. and Merrill Lynch & Co., Inc. ("Merrill
Lynch") combined Merrill Lynch's investment management business, Merrill Lynch
Investment Managers, L.P. ("MLIM"), and its affiliates, including Fund Asset
Management, L.P. ("FAM"), with BlackRock, Inc. to create a new independent
company. Merrill Lynch has a 49.8% economic interest and a 45% voting interest
in the combined company and The PNC Financial Services Group, Inc. ("PNC"),
has approximately a 34% economic and voting interest. The new company operates
under the BlackRock name and is governed by a board of directors with a
majority of independent members.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Notes to Financial Statements (continued)


On August 15, 2006, shareholders of the Fund approved a new Investment
Advisory Agreement with BlackRock Advisors, Inc., which was recently
reorganized into a limited liability company and renamed BlackRock Advisors,
LLC. The new investment advisory agreement between the Fund and the Manager
became effective on September 29, 2006. Prior to September 29, 2006, FAM was
the Fund's Manager. The general partner of FAM is Princeton Services, Inc.
("PSI"), an indirect, wholly owned subsidiary of Merrill Lynch, which is the
limited partner.

The Manager is responsible for the management of the Fund's portfolio and
provides the necessary personnel, facilities, equipment and certain other
services necessary to the operations of the Fund. For such services, the Fund
pays a monthly fee at an annual rate of .50% of the Fund's average daily net
assets plus the proceeds of any outstanding borrowings used for leverage. In
addition, the Manager has entered into a Sub-Advisory Agreement with BlackRock
Financial Management, Inc., an affiliate of the Manager, under which the
Manager pays the Sub-Adviser for services it provides a monthly fee that is a
percentage of the management fee paid by the Fund to the Manager.

The Fund has received an exemptive order from the Securities and Exchange
Commission permitting it to lend portfolio securities to Merrill Lynch,
Pierce, Fenner & Smith Incorporated, an affiliate of the Manager, or its
affiliates. Pursuant to that order, the Fund has retained BlackRock Investment
Management, LLC ("BIM") as the securities lending agent for a fee based on a
share of the returns on investment of cash collateral. Prior to September 29,
2006, BIM was organized as Merrill Lynch Investment Managers, LLC ("MLIM,
LLC"), an affiliate of FAM, and MLIM, LLC was the securities lending agent.
BIM may, on behalf of the Fund, invest cash collateral received by the Fund
for such loans, among other things, in a private investment company managed by
the Manager or in registered money market funds advised by the Manager or its
affiliates.

For the year ended February 28, 2007, the Fund reimbursed FAM and the Manager
$4,315 and $2,685, respectively, for certain accounting services.

Prior to September 29, 2006, certain officers and/or directors of the Fund were
officers and/or directors of FAM, PSI, Merrill Lynch, MLIM, and/or MLIM, LLC.

Commencing September 29, 2006, certain officers and/or directors of the Fund
are officers and/or directors of BlackRock, Inc. or its affiliates.


3. Investments:
Purchases and sales (including paydowns) of investments, excluding short-term
securities, for the year ended February 28, 2007 were $288,534,749 and
$292,678,723, respectively.


4. Stock Transactions:
The Fund is authorized to issue 200,000,000 shares of capital stock, par value
$.10 per share, all of which were initially classified as Common Stock. The
Board of Directors is authorized, however, to classify and reclassify any
unissued shares of capital stock without approval of the holders of Common
Stock.

Shares issued and outstanding during the years ended February 28, 2007 and
February 28, 2006 increased by 332,841 and 200,735, respectively, as a result
of dividend reinvestment.


5. Unfunded Loan Commitments:
As of February 28, 2007, the Fund had unfunded loan commitments of
approximately $3,500,000, which would be extended at the option of the
borrower, pursuant to the following loan agreements:


                                                         (in Thousands)

                                                               Value of
                                            Unfunded         Underlying
Borrower                                  Commitment               Loan

Calpine Corp.                                 $1,500             $1,496
MEG Energy Corp.                              $  500             $  497
Venetian Macau U.S. Finance Co. LLC           $1,500             $1,504


6. Short-Term Borrowings:
On May 22, 2006, the Fund renewed its revolving credit and security agreement
funded by a commercial paper asset securitization program with Citicorp North
America, Inc. ("Citicorp") as Agent, certain secondary backstop lenders, and
certain asset securitization conduits as lenders (the "Lenders"). The
agreement was renewed for one year and has a maximum limit of $175,000,000.
Under the Citicorp program, the conduits will fund advances to the Fund
through the issuance of highly rated commercial paper. As security for its
obligations to the Lenders under the revolving securitization facility, the
Fund has granted a security interest in substantially all of its assets to and
in favor of the Lenders. The interest rate on the Fund's borrowings is based
on the interest rate carried by the commercial paper plus a program fee. The
Fund pays additional borrowing costs including a backstop commitment fee.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Notes to Financial Statements (concluded)


The weighted average annual interest rate was 5.48% and the average borrowing
was approximately $131,575,000 for the year ended February 28, 2007.


7. Distributions to Shareholders:
The Fund paid an ordinary income dividend in the amount of $.047000 per share
on March 30, 2007 to shareholders of record on March 15, 2007.

The tax character of distributions paid during the fiscal years ended February
28, 2007 and February 28, 2006 was as follows:


                                           2/28/2007          2/28/2006

Distributions paid from:
  Ordinary income                    $    31,608,871    $    31,484,794
                                     ---------------    ---------------
Total taxable distributions          $    31,608,871    $    31,484,794
                                     ===============    ===============


As of February 28, 2007, the components of accumulated losses on a tax
basis were as follows:

Undistributed ordinary income--net                      $     2,240,131
Undistributed long-term capital gains--net                           --
                                                        ---------------
Total undistributed earnings--net                             2,240,131
Capital loss carryforward                                (152,916,193)*
Unrealized gains--net                                       1,448,086**
                                                        ---------------
Total accumulated losses--net                           $ (149,227,976)
                                                        ===============

 * On February 28, 2007, the Fund had a net capital loss carry-
   forward of $152,916,193, of which $12,755,214 expires in 2008,
   $25,658,795 expires in 2009, $54,958,583 expires in 2010,
   $30,706,546 expires in 2011, $22,345,071 expires in 2012,
   $4,906,362 expires in 2014 and $1,585,622 expires in 2015. This
   amount will be available to offset like amounts of any future
   taxable gains.

** The difference between book-basis and tax-basis net unrealized
   gains is attributable primarily to the tax deferral of losses on wash
   sales, the book/tax differences in the accrual of income on securities
   in default, the difference between book and tax amortization
   methods for premiums and discounts on fixed income securities
   and other book/tax temporary differences.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Report of Independent Registered Public Accounting Firm


To the Shareholders and Board of Directors of
BlackRock Senior High Income Fund, Inc.:

We have audited the accompanying statement of assets, liabilities and capital,
including the schedule of investments, of BlackRock Senior High Income Fund,
Inc. (the "Fund") (formerly Senior High Income Portfolio, Inc.) as of February
28, 2007, and the related statements of operations and cash flows for the year
then ended, the statements of changes in net assets for each of the two years
in the period then ended, and the financial highlights for each of the five
years in the period then ended. These financial statements and financial
highlights are the responsibility of the Fund's management. Our responsibility
is to express an opinion on these financial statements and financial
highlights based on our audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we
plan and perform the audit to obtain reasonable assurance about whether the
financial statements and financial highlights are free of material
misstatement. The Fund is not required to have, nor were we engaged to
perform, an audit of its internal control over financial reporting. Our audits
included consideration of internal control over financial reporting as a basis
for designing audit procedures that are appropriate in the circumstances, but
not for the purpose of expressing an opinion on the effectiveness of the
Fund's internal control over financial reporting. Accordingly, we express no
such opinion. An audit also includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimates made by management,
as well as evaluating the overall financial statement presentation. Our
procedures included confirmation of securities owned as of February 28, 2007,
by correspondence with the custodian and financial intermediaries; where
replies were not received from financial intermediaries, we performed other
auditing procedures. We believe that our audits provide a reasonable basis for
our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of
BlackRock Senior High Income Fund, Inc. as of February 28, 2007, the results
of its operations and its cash flows for the year then ended, the changes in
its net assets for each of the two years in the period then ended, and its
financial highlights for each of the five years in the period then ended, in
conformity with accounting principles generally accepted in the United States
of America.


Deloitte & Touche LLP
Princeton, New Jersey


April 23, 2007



Fund Certification (unaudited)


In September 2006, the Fund filed its Chief Executive Officer Certification
with the New York Stock Exchange pursuant to Section 303A.12(a) of the New
York Stock Exchange Corporate Governance Listing Standards.

The Fund's Chief Executive Officer and Chief Financial Officer Certifications
pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 were filed with the
Fund's Form N-CSR and are available on the Securities and Exchange
Commission's Web site at http://www.sec.gov.



Important Tax Information (unaudited)


The following information is provided with respect to the ordinary income
distributions paid by BlackRock Senior High Income Fund, Inc. for the fiscal
year ended February 28, 2007:

Interest-Related Dividends for Non-U.S. Residents

Month Paid:       March 2006                                70.81%*
                  April 2006 - January 2007                 88.24%*
                  February 2007                             71.94%*

 * Represents the portion of the taxable ordinary income dividends eligible
   for exemption from U.S. withholding tax for nonresident aliens and foreign
   corporations.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Automatic Dividend Reinvestment Plan


How the Plan Works--The Fund offers a Dividend Reinvestment Plan (the "Plan")
under which income and capital gains dividends paid by the Fund are
automatically reinvested in additional shares of Common Stock of the Fund. The
Plan is administered on behalf of the shareholders by The Bank of New York
(the "Plan Agent"). Under the Plan, whenever the Fund declares a dividend,
participants in the Plan will receive the equivalent in shares of Common Stock
of the Fund. The Plan Agent will acquire the shares for the participant's
account either (i) through receipt of additional unissued but authorized
shares of the Fund ("newly issued shares") or (ii) by purchase of outstanding
shares of Common Stock on the open market on the New York Stock Exchange or
elsewhere. If, on the dividend payment date, the Fund's net asset value per
share is equal to or less than the market price per share plus estimated
brokerage commissions (a condition often referred to as a "market premium"),
the Plan Agent will invest the dividend amount in newly issued shares. If the
Fund's net asset value per share is greater than the market price per share (a
condition often referred to as a "market discount"), the Plan Agent will
invest the dividend amount by purchasing on the open market additional shares.
If the Plan Agent is unable to invest the full dividend amount in open market
purchases, or if the market discount shifts to a market premium during the
purchase period, the Plan Agent will invest any uninvested portion in newly
issued shares. The shares acquired are credited to each shareholder's account.
The amount credited is determined by dividing the dollar amount of the
dividend by either (i) when the shares are newly issued, the net asset value
per share on the date the shares are issued or (ii) when shares are purchased
in the open market, the average purchase price per share.

Participation in the Plan--Participation in the Plan is automatic, that is, a
shareholder is automatically enrolled in the Plan when he or she purchases
shares of Common Stock of the Fund unless the shareholder specifically elects
not to participate in the Plan. Shareholders, who elect not to participate,
will receive all dividend distributions in cash. Shareholders, who do not wish
to participate in the Plan, must advise the Plan Agent in writing (at the
address set forth below) that they elect not to participate in the Plan.
Participation in the Plan is completely voluntary and may be terminated or
resumed at any time without penalty by writing to the Plan Agent.

Benefits of the Plan--The Plan provides an easy, convenient way for
shareholders to make additional, regular investments in the Fund. The Plan
promotes a long-term strategy of investing at a lower cost. All shares
acquired pursuant to the Plan receive voting rights. In addition, if the
market price plus commissions of the Fund's shares is above the net asset
value, participants in the Plan will receive shares of the Fund for less than
they could otherwise purchase them and with a cash value greater than the
value of any cash distribution they would have received. However, there may
not be enough shares available in the market to make distributions in shares
at prices below the net asset value. Also, since the Fund does not redeem
shares, the price on resale may be more or less than the net asset value.

Plan Fees--There are no enrollment fees or brokerage fees for participating in
the Plan. The Plan Agent's service fees for handling the reinvestment of
distributions are paid for by the Fund. However, brokerage commissions may be
incurred when the Fund purchases shares on the open market and shareholders
will pay a pro rata share of any such commissions.

Tax Implications--The automatic reinvestment of dividends and distributions
will not relieve participants of any federal, state or local income tax that
may be payable (or required to be withheld) on such dividends. Therefore,
income and capital gains may still be realized even though shareholders do not
receive cash. Participation in the Plan generally will not affect the tax-
exempt status of exempt interest dividends paid by the Fund. If, when the
Fund's shares are trading at a market premium, the Fund issues shares pursuant
to the Plan that have a greater fair market value than the amount of cash
reinvested, it is possible that all or a portion of the discount from the
market value (which may not exceed 5% of the fair market value of the Fund's
shares) could be viewed as a taxable distribution. If the discount is viewed
as a taxable distribution, it is also possible that the taxable character of
this discount would be allocable to all the shareholders, including
shareholders who do not participate in the Plan. Thus, shareholders who do not
participate in the Plan might be required to report as ordinary income a
portion of their distributions equal to their allocable share of the discount.

Contact Information--All correspondence concerning the Plan, including any
questions about the Plan, should be directed to the Plan Agent at The Bank of
New York, Church Street Station, P.O. Box 11258, New York, NY 10286-1258,
Telephone: 800-432-8224.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Officers and Directors


                                                                                                 Number of
                                                                                                 Funds and
                                                                                                 Portfolios in  Other Public
                         Position(s)   Length of                                                 Fund Complex   Directorships
                         Held with     Time                                                      Overseen by    Held by
Name, Address & Age      Fund          Served   Principal Occupation(s) During Past 5 Years      Director       Director
                                                                                                 
Interested Director


Robert C. Doll, Jr.*     President     2005 to  Vice Chairman and Director of BlackRock, Inc.,   122 Funds      None
P.O. Box 9011            and           present  Global Chief Investment Officer for Equities,    168 Portfolios
Princeton,               Director               Chairman of the BlackRock Retail Operating
NJ 08543-9011                                   Committee, and member of the BlackRock
Age: 52                                         Executive Committee since 2006; President of
                                                the funds advised by Merrill Lynch Investment
                                                Managers, L.P. ("MLIM") and its affiliates
                                                ("MLIM/FAM-advised funds") from 2005 to
                                                2006 and Chief Investment Officer thereof from
                                                2001 to 2006; President of MLIM and Fund Asset
                                                Management, L.P. ("FAM") from 2001 to 2006;
                                                Co-Head (Americas Region) thereof from 2000
                                                to 2001 and Senior Vice President from 1999 to
                                                2001; President and Director of Princeton Services,
                                                Inc. ("Princeton Services") and President of
                                                Princeton Administrators, L.P. ("Princeton
                                                Administrators") from 2001 to 2006; Chief
                                                Investment Officer of OppenheimerFunds, Inc. in
                                                1999 and Executive Vice President thereof from
                                                1991 to 1999.


 * Mr. Doll is a director, trustee or member of an advisory board of certain other
   investment companies for which BlackRock Advisors, LLC and its affiliates act as
   investment adviser. Mr. Doll is an "interested person," as defined in the
   Investment Company Act, of the Fund based on his positions with BlackRock, Inc.
   and its affiliates. Directors serve until their resignation, removal or death, or
   until December 31 of the year in which they turn 72. As Fund President, Mr. Doll
   serves at the pleasure of the Board of Directors.




Independent Directors*


Ronald W. Forbes**       Director      1993 to  Professor Emeritus of Finance, School of         47 Funds       None
P.O. Box 9095                          present  Business, State University of New York at        49 Portfolios
Princeton,                                      Albany since 2000 and Professor thereof from
NJ 08543-9095                                   1989 to 2000; International Consultant, Urban
Age: 66                                         Institute, Washington, D.C. from 1995 to 1999.


Cynthia A. Montgomery++  Director      1994 to  Professor, Harvard Business School since 1989;   47 Funds       Newell
P.O. Box 9095                          present  Associate Professor, J.L. Kellogg Graduate       49 Portfolios  Rubbermaid, Inc.
Princeton,                                      School of Management, Northwestern University                   (manufacturing)
NJ 08543-9095                                   from 1985 to 1989; Associate Professor, Graduate
Age: 54                                         School of Business Administration, University of
                                                Michigan from 1979 to 1985; Director, Harvard
                                                Business School Publishing since 2005; Director,
                                                McLean Hospital since 2005.


Jean Margo Reid          Director      2004 to  Self-employed consultant since 2001; Counsel     47 Funds       None
P.O. Box 9095                          present  of Alliance Capital Management (investment       49 Portfolios
Princeton,                                      adviser) in 2000; General Counsel, Director
NJ 08543-9095                                   and Secretary of Sanford C. Bernstein & Co.,
Age: 61                                         Inc. (investment adviser/broker-dealer) from
                                                1997 to 2000; Secretary, Sanford C. Bernstein
                                                Fund, Inc. from 1994 to 2000; Director and
                                                Secretary of SCB, Inc. since 1998; Director and
                                                Secretary of SCB Partners, Inc. since 2000; and
                                                Director of Covenant House from 2001 to 2004.


  * Directors serve until their resignation, removal or death,
    or until December 31 of the year in which they turn 72.

 ** Chairman of the Board of Directors and the Audit Committee.

 ++ Chair of the Nominating Committee.




BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Officers and Directors (continued)


                                                                                                 Number of
                                                                                                 Funds and
                                                                                                 Portfolios in  Other Public
                         Position(s)   Length of                                                 Fund Complex   Directorships
                         Held with     Time                                                      Overseen by    Held by
Name, Address & Age      Fund          Served   Principal Occupation(s) During Past 5 Years      Director       Director
                                                                                                 
Independent Directors*

Roscoe S. Suddarth       Director      2000 to  President, Middle East Institute, from 1995 to   47 Funds       None
P.O. Box 9095                          present  2001; Foreign Service Officer, United States     49 Portfolios
Princeton,                                      Foreign Service, from 1961 to 1995 and Career
NJ 08543-9095                                   Minister from 1989 to 1995; Deputy Inspector
Age: 71                                         General, U.S. Department of State, from 1991 to
                                                1994; U.S. Ambassador to the Hashemite Kingdom
                                                of Jordan from 1987 to 1990.


Richard R. West          Director      1993 to  Professor of Finance from 1984 to 1995, Dean     47 Funds       Bowne & Co.,
P.O. Box 9095                          present  from 1984 to 1993 and since 1995 Dean            49 Portfolios  Inc. (financial
Princeton,                                      Emeritus of New York University's Leonard N.                    printers);
NJ 08543-9095                                   Stern School of Business Administration.                        Vornado Realty
Age: 69                                                                                                         Trust (real
                                                                                                                estate company);
                                                                                                                Alexander's, Inc.
                                                                                                                (real estate
                                                                                                                company)


 * Directors serve until their resignation, removal or death,
   or until December 31 of the year in which they turn 72.




Fund Officers*


Donald C. Burke          Vice          1993 to  Managing Director of BlackRock, Inc. since 2006; Managing Director of Merrill
P.O. Box 9011            President     present  Lynch Investment Managers, L.P. ("MLIM") and Fund Asset Management, L.P.
Princeton,               and           and      ("FAM") in 2006; First Vice President of MLIM and FAM from 1997 to 2005 and
NJ 08543-9011            Treasurer     1999 to  Treasurer thereof from 1999 to 2006; Vice President of MLIM and FAM from 1990
Age: 46                                present  to 1997.


Kevin J. Booth           Vice          2001 to  Managing Director of BlackRock, Inc. since 2006; Managing Director (Global
P.O. Box 9011            President     present  Fixed Income) of MLIM in 2006; Director of MLIM from 1998 to 2005; Vice
Princeton,                                      President of MLIM from 1991 to 1998.
NJ 08543-9011
Age: 52


Jeffrey Hiller           Fund Chief    2004 to  Managing Director of BlackRock, Inc. and Fund Chief Compliance Officer since
P.O. Box 9011            Compliance    present  2006; Chief Compliance Officer of the MLIM/FAM-advised funds and First Vice
Princeton,               Officer                President and Chief Compliance Officer of MLIM (Americas Region) from 2004 to
NJ 08543-9011                                   2006; Chief Compliance Officer of the IQ Funds since 2004; Global Director of
Age: 55                                         Compliance at Morgan Stanley Investment Management from 2002 to 2004; Managing
                                                Director and Global Director of Compliance at Citigroup Asset Management from
                                                2000 to 2002; Chief Compliance Officer at Soros Fund Management in 2000; Chief
                                                Compliance Officer at Prudential Financial from 1995 to 2000; Senior Counsel in
                                                the Securities and Exchange Commission's Division of Enforcement in Washington,
                                                D.C. from 1990 to 1995.


Alice A. Pellegrino      Secretary     2004 to  Director of BlackRock, Inc. since 2006; Director (Legal Advisory) of MLIM from
P.O. Box 9011                          present  2002 to 2006; Vice President of MLIM from 1999 to 2002; Attorney associated
Princeton,                                      with MLIM from 1997 to 1999; Secretary of MLIM, FAM, FAM Distributors, Inc. and
NJ 08543-9011                                   Princeton Services from 2004 to 2006.
Age: 46


 * Officers of the Fund serve at the pleasure of the Board of Directors.




BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Officers and Directors (concluded)


Custodian
The Bank of New York
100 Church Street
New York, NY 10286


Transfer Agent
The Bank of New York
101 Barclay Street--11 East
New York, NY 10286


NYSE Symbol
ARK


Effective January 1, 2007, Edward D. Zinbarg retired as a Director of
BlackRock Senior High Income Fund, Inc. The Fund's Board of Directors wishes
Mr. Zinbarg well in his retirement.

Effective April 13, 2007, Jeffrey Hiller resigned his position as Chief
Compliance Officer of the Fund. Also effective April 13, 2007, Karen Clark was
appointed Chief Compliance Officer of the Fund. Ms. Clark has been a Managing
Director of BlackRock, Inc. since 2007. She was a Director thereof from 2005
to 2007. Prior to that, Ms. Clark was a principal and senior compliance
officer at State Street Global Advisors from 2001 to 2005. Ms. Clark was a
principal consultant with PricewaterhouseCoopers, LLP from 1998 to 2001. From
1993 to 1998, Ms. Clark was Branch Chief, Division of Investment Management
and Office of Compliance Examinations, with the U.S. Securities and Exchange
Commission.



BlackRock Privacy Principles


BlackRock is committed to maintaining the privacy of its current and former
fund investors and individual clients (collectively, "Clients") and to
safeguarding their nonpublic personal information. The following information
is provided to help you understand what personal information BlackRock
collects, how we protect that information and why in certain cases we share
such information with select parties.

If you are located in a jurisdiction where specific laws, rules or regulations
require BlackRock to provide you with additional or different privacy-related
rights beyond what is set forth below, then BlackRock will comply with those
specific laws, rules or regulations.

BlackRock obtains or verifies personal nonpublic information from and about
you from different sources, including the following: (i) information we
receive from you or, if applicable, your financial intermediary, on
applications, forms or other documents; (ii) information about your
transactions with us, our affiliates, or others; (iii) information we receive
from a consumer reporting agency; and (iv) from visits to our Web sites.

BlackRock does not sell or disclose to nonaffiliated third parties any
nonpublic personal information about its Clients, except as permitted by law
or as is necessary to service Client accounts. These nonaffiliated third
parties are required to protect the confidentiality and security of this
information and to use it only for its intended purpose.

We may share information with our affiliates to service your account or to
provide you with information about other BlackRock products or services that
may be of interest to you. In addition, BlackRock restricts access to
nonpublic personal information about its Clients to those BlackRock employees
with a legitimate business need for the information. BlackRock maintains
physical, electronic and procedural safeguards that are designed to protect
the nonpublic personal information of its Clients, including procedures
relating to the proper storage and disposal of such information.



BLACKROCK SENIOR HIGH INCOME FUND, INC.                       FEBRUARY 28, 2007



Item 2 -   Code of Ethics - The registrant has adopted a code of ethics, as of
           the end of the period covered by this report, that applies to the
           registrant's principal executive officer, principal financial
           officer and principal accounting officer, or persons performing
           similar functions.  A copy of the code of ethics is available
           without charge at www.blackrock.com.

Item 3 -   Audit Committee Financial Expert - The registrant's board of
           directors has determined that (i) the registrant has the following
           audit committee financial experts serving on its audit committee and
           (ii) each audit committee financial expert is independent: (1)
           Ronald W. Forbes, (2) Richard R. West, and (3) Edward D. Zinbarg
           (retired as of December 31, 2006).

Item 4 -   Principal Accountant Fees and Services

           (a) Audit Fees -     Fiscal Year Ending February 28, 2007 - $41,300
                                Fiscal Year Ending February 28, 2006 - $41,300

           (b) Audit-Related Fees -
                                Fiscal Year Ending February 28, 2007 - $8,000
                                Fiscal Year Ending February 28, 2006 - $8,000

           The nature of the services include agreed upon procedures related to
           the credit facility.

           (c) Tax Fees -       Fiscal Year Ending February 28, 2007 - $6,100
                                Fiscal Year Ending February 28, 2006 - $6,000

           The nature of the services include tax compliance, tax advice and
           tax planning.

           (d) All Other Fees - Fiscal Year Ending February 28, 2007 - $0
                                Fiscal Year Ending February 28, 2006 - $0

           (e)(1) The registrant's audit committee (the "Committee") has
           adopted policies and procedures with regard to the pre-approval of
           services.  Audit, audit-related and tax compliance services provided
           to the registrant on an annual basis require specific pre-approval
           by the Committee.  The Committee also must approve other non-audit
           services provided to the registrant and those non-audit services
           provided to the registrant's affiliated service providers that
           relate directly to the operations and the financial reporting of the
           registrant.  Certain of these non-audit services that the Committee
           believes are a) consistent with the SEC's auditor independence rules
           and b) routine and recurring services that will not impair the
           independence of the independent accountants may be approved by the
           Committee without consideration on a specific case-by-case basis
           ("general pre-approval").  However, such services will only be
           deemed pre-approved provided that any individual project does not
           exceed $5,000 attributable to the registrant or $50,000 for all of
           the registrants the Committee oversees.  Any proposed services
           exceeding the pre-approved cost levels will require specific pre-
           approval by the Committee, as will any other services not subject to
           general pre-approval (e.g., unanticipated but permissible services).
           The Committee is informed of each service approved subject to
           general pre-approval at the next regularly scheduled in-person board
           meeting.

           (e)(2)  0%

           (f) Not Applicable

           (g) Fiscal Year Ending February 28, 2007 - $3,034,617
               Fiscal Year Ending February 28, 2006 - $4,944,454

           (h) The registrant's audit committee has considered and determined
           that the provision of non-audit services that were rendered to the
           registrant's investment adviser and any entity controlling,
           controlled by, or under common control with the investment adviser
           that provides ongoing services to the registrant that were not pre-
           approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation
           S-X is compatible with maintaining the principal accountant's
           independence.

           Regulation S-X Rule 2-01(c)(7)(ii) - $1,739,500, 0%

Item 5 -   Audit Committee of Listed Registrants - The following individuals
           are members of the registrant's separately-designated standing audit
           committee established in accordance with Section 3(a)(58)(A) of the
           Exchange Act (15 U.S.C. 78c(a)(58)(A)):

           Ronald W. Forbes
           Cynthia A. Montgomery
           Jean Margo Reid
           Roscoe S. Suddarth
           Richard R. West
           Edward D. Zinbarg (retired as of December 31, 2006)

Item 6 -   Schedule of Investments - Not Applicable

Item 7 -   Disclosure of Proxy Voting Policies and Procedures for Closed-End
           Management Investment Companies -
           Proxy Voting Policies and Procedures
           ------------------------------------

           Each Fund's Board of Directors has delegated to the Manager
           authority to vote all proxies relating to the Fund's portfolio
           securities. The Manager has adopted policies and procedures (the
           "Proxy Voting Procedures") with respect to the voting of proxies
           related to the portfolio securities held in the account of one or
           more of its clients, including a Fund. Pursuant to these Proxy
           Voting Procedures, the Manager's primary objective when voting
           proxies is to make proxy voting decisions solely in the best
           interests of each Fund and its shareholders, and to act in a manner
           that the Manager believes is most likely to enhance the economic
           value of the securities held by the Fund. The Proxy Voting
           Procedures are designed to ensure that the Manager considers the
           interests of its clients, including each Fund, and not the interests
           of the Manager, when voting proxies and that real (or perceived)
           material conflicts that may arise between the Manager's interest and
           those of the Manager's clients are properly addressed and resolved.

           In order to implement the Proxy Voting Procedures, the Manager has
           formed a Proxy Voting Committee (the "Committee"). The Committee,
           which is a subcommittee of the Manager's Equity Investment Policy
           Oversight Committee ("EIPOC"), is comprised of a senior member of
           the Manager's equity management group who is also a member of EIPOC,
           one or more other senior investment professionals appointed by
           EIPOC, portfolio managers and investment analysts appointed by EIPOC
           and any other personnel EIPOC deems appropriate. The Committee will
           also include two non-voting representatives from the Manager's Legal
           Department appointed by the Manager's General Counsel. The
           Committee's membership shall be limited to full-time employees of
           the Manager. No person with any investment banking, trading, retail
           brokerage or research responsibilities for the Manager's affiliates
           may serve as a member of the Committee or participate in its
           decision making (except to the extent such person is asked by the
           Committee to present information to the Committee on the same basis
           as other interested knowledgeable parties not affiliated with the
           Manager might be asked to do so). The Committee determines how to
           vote the proxies of all clients, including a Fund, that have
           delegated proxy voting authority to the Manager and seeks to ensure
           that all votes are consistent with the best interests of those
           clients and are free from unwarranted and inappropriate influences.
           The Committee establishes general proxy voting policies for the
           Manager and is responsible for determining how those policies are
           applied to specific proxy votes, in light of each issuer's unique
           structure, management, strategic options and, in certain
           circumstances, probable economic and other anticipated consequences
           of alternate actions. In so doing, the Committee may determine to
           vote a particular proxy in a manner contrary to its generally stated
           policies. In addition, the Committee will be responsible for
           ensuring that all reporting and recordkeeping requirements related
           to proxy voting are fulfilled.

           The Committee may determine that the subject matter of a recurring
           proxy issue is not suitable for general voting policies and requires
           a case-by-case determination. In such cases, the Committee may elect
           not to adopt a specific voting policy applicable to that issue. The
           Manager believes that certain proxy voting issues require investment
           analysis - such as approval of mergers and other significant
           corporate transactions - akin to investment decisions, and are,
           therefore, not suitable for general guidelines. The Committee may
           elect to adopt a common position for the Manager on certain proxy
           votes that are akin to investment decisions, or determine to permit
           the portfolio manager to make individual decisions on how best to
           maximize economic value for a Fund (similar to normal buy/sell
           investment decisions made by such portfolio managers). While it is
           expected that the Manager will generally seek to vote proxies over
           which the Manager exercises voting authority in a uniform manner for
           all the Manager's clients, the Committee, in conjunction with a
           Fund's portfolio manager, may determine that the Fund's specific
           circumstances require that its proxies be voted differently.

           To assist the Manager in voting proxies, the Committee has retained
           Institutional Shareholder Services ("ISS"). ISS is an independent
           adviser that specializes in providing a variety of fiduciary-level
           proxy-related services to institutional investment managers, plan
           sponsors, custodians, consultants, and other institutional
           investors. The services provided to the Manager by ISS include in-
           depth research, voting recommendations (although the Manager is not
           obligated to follow such recommendations), vote execution, and
           recordkeeping. ISS will also assist the Fund in fulfilling its
           reporting and recordkeeping obligations under the Investment Company
           Act.

           The Manager's Proxy Voting Procedures also address special
           circumstances that can arise in connection with proxy voting. For
           instance, under the Proxy Voting Procedures, the Manager generally
           will not seek to vote proxies related to portfolio securities that
           are on loan, although it may do so under certain circumstances. In
           addition, the Manager will vote proxies related to securities of
           foreign issuers only on a best efforts basis and may elect not to
           vote at all in certain countries where the Committee determines that
           the costs associated with voting generally outweigh the benefits.
           The Committee may at any time override these general policies if it
           determines that such action is in the best interests of a Fund.

           From time to time, the Manager may be required to vote proxies in
           respect of an issuer where an affiliate of the Manager (each, an
           "Affiliate"), or a money management or other client of the Manager,
           including investment companies for which the Manager provides
           investment advisory, administrative and/or other services (each, a
           "Client"), is involved. The Proxy Voting Procedures and the
           Manager's adherence to those procedures are designed to address such
           conflicts of interest. The Committee intends to strictly adhere to
           the Proxy Voting Procedures in all proxy matters, including matters
           involving Affiliates and Clients. If, however, an issue representing
           a non-routine matter that is material to an Affiliate or a widely
           known Client is involved such that the Committee does not reasonably
           believe it is able to follow its guidelines (or if the particular
           proxy matter is not addressed by the guidelines) and vote
           impartially, the Committee may, in its discretion for the purposes
           of ensuring that an independent determination is reached, retain an
           independent fiduciary to advise the Committee on how to vote or to
           cast votes on behalf of the Manager's clients.

           In the event that the Committee determines not to retain an
           independent fiduciary, or it does not follow the advice of such an
           independent fiduciary, the Committee may pass the voting power to a
           subcommittee, appointed by EIPOC (with advice from the Secretary of
           the Committee), consisting solely of Committee members selected by
           EIPOC. EIPOC shall appoint to the subcommittee, where appropriate,
           only persons whose job responsibilities do not include contact with
           the Client and whose job evaluations would not be affected by the
           Manager's relationship with the Client (or failure to retain such
           relationship). The subcommittee shall determine whether and how to
           vote all proxies on behalf of the Manager's clients or, if the proxy
           matter is, in their judgment, akin to an investment decision, to
           defer to the applicable portfolio managers, provided that, if the
           subcommittee determines to alter the Manager's normal voting
           guidelines or, on matters where the Manager's policy is case-by-
           case, does not follow the voting recommendation of any proxy voting
           service or other independent fiduciary that may be retained to
           provide research or advice to the Manager on that matter, no proxies
           relating to the Client may be voted unless the Secretary, or in the
           Secretary's absence, the Assistant Secretary of the Committee
           concurs that the subcommittee's determination is consistent with the
           Manager's fiduciary duties.

           In addition to the general principles outlined above, the Manager
           has adopted voting guidelines with respect to certain recurring
           proxy issues that are not expected to involve unusual circumstances.
           These policies are guidelines only, and the Manager may elect to
           vote differently from the recommendation set forth in a voting
           guideline if the Committee determines that it is in a Fund's best
           interest to do so. In addition, the guidelines may be reviewed at
           any time upon the request of a Committee member and may be amended
           or deleted upon the vote of a majority of Committee members present
           at a Committee meeting at which there is a quorum.

           The Manager has adopted specific voting guidelines with respect to
           the following proxy issues:

           * Proposals related to the composition of the board of directors of
           issuers other than investment companies. As a general matter, the
           Committee believes that a company's board of directors (rather than
           shareholders) is most likely to have access to important, nonpublic
           information regarding a company's business and prospects, and is,
           therefore, best-positioned to set corporate policy and oversee
           management. The Committee, therefore, believes that the foundation
           of good corporate governance is the election of qualified,
           independent corporate directors who are likely to diligently
           represent the interests of shareholders and oversee management of
           the corporation in a manner that will seek to maximize shareholder
           value over time. In individual cases, the Committee may look at a
           nominee's number of other directorships, history of representing
           shareholder interests as a director of other companies or other
           factors, to the extent the Committee deems relevant.

           * Proposals related to the selection of an issuer's independent
           auditors. As a general matter, the Committee believes that corporate
           auditors have a responsibility to represent the interests of
           shareholders and provide an independent view on the propriety of
           financial reporting decisions of corporate management. While the
           Committee will generally defer to a corporation's choice of auditor,
           in individual cases, the Committee may look at an auditors' history
           of representing shareholder interests as auditor of other companies,
           to the extent the Committee deems relevant.

           * Proposals related to management compensation and employee
           benefits. As a general matter, the Committee favors disclosure of an
           issuer's compensation and benefit policies and opposes excessive
           compensation, but believes that compensation matters are normally
           best determined by an issuer's board of directors, rather than
           shareholders. Proposals to "micro-manage" an issuer's compensation
           practices or to set arbitrary restrictions on compensation or
           benefits will, therefore, generally not be supported.

           * Proposals related to requests, principally from management, for
           approval of amendments that would alter an issuer's capital
           structure. As a general matter, the Committee will support requests
           that enhance the rights of common shareholders and oppose requests
           that appear to be unreasonably dilutive.

           * Proposals related to requests for approval of amendments to an
           issuer's charter or by-laws. As a general matter, the Committee
           opposes poison pill provisions.

           * Routine proposals related to requests regarding the formalities of
           corporate meetings.

           * Proposals related to proxy issues associated solely with holdings
           of investment company shares. As with other types of companies, the
           Committee believes that a fund's board of directors (rather than its
           shareholders) is best positioned to set fund policy and oversee
           management. However, the Committee opposes granting boards of
           directors authority over certain matters, such as changes to a
           fund's investment objective, which the Investment Company Act
           envisions will be approved directly by shareholders.

           * Proposals related to limiting corporate conduct in some manner
           that relates to the shareholder's environmental or social concerns.
           The Committee generally believes that annual shareholder meetings
           are inappropriate forums for discussion of larger social issues, and
           opposes shareholder resolutions "micromanaging" corporate conduct or
           requesting release of information that would not help a shareholder
           evaluate an investment in the corporation as an economic matter.
           While the Committee is generally supportive of proposals to require
           corporate disclosure of matters that seem relevant and material to
           the economic interests of shareholders, the Committee is generally
           not supportive of proposals to require disclosure of corporate
           matters for other purposes.

           Information about how a Fund voted proxies relating to securities
           held in the Fund's portfolio during the most recent 12 month
           period ended February 28 is available without charge (1) at
           www.blackrock.com and (2) on the Commission's web site at
           http://www.sec.gov.

Item 8 -   Portfolio Managers of Closed-End Management Investment Companies -
           as of February 28, 2007.

           (a)(1) The Fund is managed by a team of investment professionals
           that is responsible for the day-to-day management of the Fund's
           portfolio.  The lead members of this team are Mark J. Williams,
           Managing Director at BlackRock, and Kevin J. Booth, Managing
           Director at BlackRock. Mr. Williams and Mr. Booth each has been a
           portfolio manager of the Fund since 2006.  Mr. Williams is
           responsible for setting the Fund's overall investment strategy and
           overseeing the management of the Fund as of October 2, 2006.  Mr.
           Booth is responsible for the day-to-day management of the Fund's
           portfolio and the selection of its investments.

           Mr. Williams is the head of BlackRock's bank loan group and a member
           of the Investment Strategy Group. His primary responsibility is
           originating and evaluating bank loan investments for the firm's
           collateralized bond obligations. He is also involved in the
           evaluation and sourcing of mezzanine investments. Prior to joining
           BlackRock in 1998, Mr. Williams spent eight years with PNC Bank's
           New York office and was a founding member of the bank's Leveraged
           Finance Group. In that capacity he was responsible for structuring
           proprietary middle market leveraged deals and sourcing and
           evaluating broadly syndicated leveraged loans in the primary and
           secondary markets for PNC Bank's investment portfolio.  From 1984
           until 1990, Mr. Williams worked in PNC Bank's Philadelphia office in
           a variety of marketing and corporate finance positions.

           Mr. Booth is a member of BlackRock's bank loan group.  He joined
           BlackRock in 2006.  Prior to joining BlackRock, Mr. Booth was a
           Managing Director (Global Fixed Income) of Merrill Lynch Investment
           Managers, L.P. ("MLIM") since 2006 and a member of MLIM's bank loan
           group from 2000 to 2006. He was a Director of MLIM from 2000 to 2006
           and was a Vice President of MLIM from 1994 to 2000.  He has been
           portfolio manager with BlackRock or MLIM since 2000.

           (a)(2) As of February 28, 2007:





                                                                         (iii) Number of Other Accounts and
                  (ii) Number of Other Accounts Managed                   Assets for Which Advisory Fee is
                        and Assets by Account Type                               Performance-Based

                           Other                                           Other
       (i) Name of       Registered     Other Pooled                     Registered    Other Pooled
       Portfolio         Investment      Investment         Other        Investment     Investment      Other
       Manager           Companies        Vehicles         Accounts      Companies       Vehicles      Accounts
                                                                                     
       Kevin J.
       Booth                      9                 2             1            0                  2          0
                   $  5,376,755,084   $   529,770,486  $   56,698,833    $     0    $   529,770,486    $     0

       Mark J.
       Williams                   8                18               1          0                 10          0
                   $  4,624,623,892   $ 6,003,278,704  $  158,013,679    $     0    $ 3,985,661,008    $     0

           (iv) Potential Material Conflicts of Interest



           BlackRock has built a professional working environment, firm-wide
           compliance culture and compliance procedures and systems designed to
           protect against potential incentives that may favor one account over
           another. BlackRock has adopted policies and procedures that address
           the allocation of investment opportunities, execution of portfolio
           transactions, personal trading by employees and other potential
           conflicts of interest that are designed to ensure that all client
           accounts are treated equitably over time. Nevertheless, BlackRock
           furnishes investment management and advisory services to numerous
           clients in addition to the Fund, and BlackRock may, consistent with
           applicable law, make investment recommendations to other clients or
           accounts (including accounts which are hedge funds or have
           performance or higher fees paid to BlackRock, or in which portfolio
           managers have a personal interest in the receipt of such fees),
           which may be the same as or different from those made to the Fund.
           In addition, BlackRock, its affiliates and any officer, director,
           stockholder or employee may or may not have an interest in the
           securities whose purchase and sale BlackRock recommends to the Fund.
           BlackRock, or any of its affiliates, or any officer, director,
           stockholder, employee or any member of their families may take
           different actions than those recommended to the Fund by BlackRock
           with respect to the same securities. Moreover, BlackRock may refrain
           from rendering any advice or services concerning securities of
           companies of which any of BlackRock's (or its affiliates') officers,
           directors or employees are directors or officers, or companies as to
           which BlackRock or any of its affiliates or the officers, directors
           and employees of any of them has any substantial economic interest
           or possesses material non-public information. Each portfolio manager
           also may manage accounts whose investment strategies may at times be
           opposed to the strategy utilized for the Fund. In this connection,
           it should be noted that certain portfolio managers currently manage
           certain accounts that are subject to performance fees. In addition,
           certain portfolio managers assist in managing certain hedge funds
           and may be entitled to receive a portion of any incentive fees
           earned on such funds and a portion of such incentive fees may be
           voluntarily or involuntarily deferred. Additional portfolio managers
           may in the future manage other such accounts or funds and may be
           entitled to receive incentive fees.

           As a fiduciary, BlackRock owes a duty of loyalty to its clients and
           must treat each client fairly. When BlackRock purchases or sells
           securities for more than one account, the trades must be allocated
           in a manner consistent with its fiduciary duties. BlackRock attempts
           to allocate investments in a fair and equitable manner among client
           accounts, with no account receiving preferential treatment. To this
           end, BlackRock has adopted a policy that is intended to ensure that
           investment opportunities are allocated fairly and equitably among
           client accounts over time. This policy also seeks to achieve
           reasonable efficiency in client transactions and provide BlackRock
           with sufficient flexibility to allocate investments in a manner that
           is consistent with the particular investment discipline and client
           base.

           (a)(3) As of February 28, 2007:

                  Compensation Program
                  BlackRock's financial arrangements with its portfolio
           managers, its competitive compensation and its career path emphasis
           at all levels reflect the value senior management places on key
           resources. Compensation may include a variety of components and may
           vary from year to year based on a number of factors. The principal
           components of compensation include a base salary, a discretionary
           bonus, participation in various benefits programs and one or more of
           the incentive compensation programs established by BlackRock such as
           its Long-Term Retention and Incentive Plan and Restricted Stock
           Program.

                  Base Compensation
                  Generally, portfolio managers receive base compensation based
           on their seniority and/or their position with the firm.

                  Discretionary Compensation
                  In addition to base compensation, portfolio managers may
           receive discretionary compensation, which can be a substantial
           portion of total compensation. Discretionary compensation can
           include a discretionary cash bonus as well as one or more of the
           following:

                  Long-Term Retention and Incentive Plan (LTIP)
                  The LTIP is a long-term incentive plan that seeks to reward
           certain key employees. The plan provides for the grant of awards
           that are expressed as an amount of cash that, if properly vested and
           subject to the attainment of certain performance goals, will be
           settled in cash and/or in BlackRock, Inc. common stock.

                  Deferred Compensation Program
                  A portion of the compensation paid to each portfolio manager
           may be voluntarily deferred by the portfolio manager into an account
           that tracks the performance of certain of the firm's investment
           products. Each portfolio manager is permitted to allocate his
           deferred amounts among various options, including to certain of the
           firm's hedge funds and other unregistered products. In addition,
           prior to 2005, a portion of the annual compensation of certain
           senior managers was mandatorily deferred in a similar manner for a
           number of years. Beginning in 2005, a portion of the annual
           compensation of certain senior managers was paid in the form of
           BlackRock, Inc. restricted stock units which vest ratably over a
           number of years.

                  Options and Restricted Stock Awards
                  While incentive stock options are not currently being awarded
           to BlackRock employees, BlackRock, Inc. previously granted stock
           options to key employees, including certain portfolio managers who
           may still hold unexercised or unvested options. BlackRock, Inc. also
           has a restricted stock award program designed to reward certain key
           employees as an incentive to contribute to the long-term success of
           BlackRock. These awards vest over a period of years.

                  Incentive Savings Plans
                  BlackRock, Inc. has created a variety of incentive savings
           plans in which BlackRock employees are eligible to participate,
           including a 401(k) plan, the BlackRock Retirement Savings Plan (RSP)
           and the BlackRock Employee Stock Purchase Plan (ESPP). The employer
           contribution components of the RSP include a company match equal to
           50% of the first 6% of eligible pay contributed to the plan capped
           at $4,000 per year, and a company retirement contribution equal to
           3% of eligible compensation, plus an additional contribution of 2%
           for any year in which BlackRock has positive net operating income.
           The RSP offers a range of investment options, including registered
           investment companies managed by the firm. Company contributions
           follow the investment direction set by participants for their own
           contributions or absent, employee investment direction, are invested
           into a stable value fund.  The ESPP allows for investment in
           BlackRock common stock at a 5% discount on the fair market value of
           the stock on the purchase date.  Annual participation in the ESPP is
           limited to the purchase of 1,000 shares or a dollar value of
           $25,000.  Each portfolio manager is eligible to participate in these
           plans.

                  Annual incentive compensation for each portfolio manager is a
           function of several components: the performance of BlackRock, Inc.,
           the performance of the portfolio manager's group within BlackRock,
           the investment performance, including risk-adjusted returns and
           income generation, of the firm's assets under management or
           supervision by that portfolio manager relative to predetermined
           benchmarks, and the individual's teamwork and contribution to the
           overall performance of these portfolios and BlackRock. Unlike many
           other firms, portfolio managers at BlackRock compete against
           benchmarks rather than each other. In most cases, including for the
           portfolio managers of the Registrant, these benchmarks are the same
           as the benchmark or benchmarks against which the investment
           performance, including risk-adjusted returns and income generation,
           of the Registrant or other accounts are measured. A group of
           BlackRock, Inc.'s officers determines which benchmarks against which
           to compare the performance of funds and other accounts managed by
           each portfolio manager.

                  The group of BlackRock, Inc.'s officers then makes a
           subjective determination with respect to the portfolio manager's
           compensation based on the performance of the funds and other
           accounts managed by each portfolio manager relative to the various
           benchmarks. This determination may take into consideration the fact
           that a benchmark may not perfectly correlate to the way the
           Registrant or other accounts are managed, even if it is the
           benchmark that is most appropriate for the Registrant or other
           account. For example, a benchmark's return may be based on the total
           return of the securities comprising the benchmark, but the
           Registrant or other account may be managed to maximize income and
           not total return. Senior portfolio managers who perform additional
           management functions within BlackRock may receive additional
           compensation for serving in these other capacities.

           (a)(4) Beneficial Ownership of Securities.  As of February 28, 2007,
                  Mr. Booth beneficially owns stock issued by the Fund in
                  the range of $50,001-$100,000.  As of February 28, 2007,
                  Mr. Williams does not beneficially own any stock issued by
                  the Fund.

Item 9 -   Purchases of Equity Securities by Closed-End Management Investment
           Company and Affiliated Purchasers - Not Applicable

Item 10 -  Submission of Matters to a Vote of Security Holders - Not Applicable

Item 11 -  Controls and Procedures

11(a) -    The registrant's certifying officers have reasonably designed such
           disclosure controls and procedures to ensure material information
           relating to the registrant is made known to us by others
           particularly during the period in which this report is being
           prepared.  The registrant's certifying officers have determined that
           the registrant's disclosure controls and procedures are effective
           based on our evaluation of these controls and procedures as of a
           date within 90 days prior to the filing date of this report.

11(b) -    As of September 29, 2006, with the conclusion of the combination of
           Merrill Lynch's asset management business with BlackRock, the
           registrant was migrated to BlackRock's trading and compliance
           monitoring systems, and various personnel changes occurred.  In
           conjunction with these business improvements, there were no changes
           in the registrants internal control over financial reporting (as
           defined in Rule 30a-3(d) under Act (17 CFR 270.30a-3(d)) that
           occurred during the last fiscal half-year of the period covered by
           this report that has materially affected, or is reasonably likely to
           affect, the registrant's internal control over financial reporting.

Item 12 -  Exhibits attached hereto

12(a)(1) - Code of Ethics - See Item 2

12(a)(2) - Certifications - Attached hereto

12(a)(3) - Not Applicable

12(b) -    Certifications - Attached hereto


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report
to be signed on its behalf by the undersigned, thereunto duly authorized.


BlackRock Senior High Income Fund, Inc.


By:    /s/ Robert C. Doll, Jr.
       -----------------------
       Robert C. Doll, Jr.,
       Chief Executive Officer of
       BlackRock Senior High Income Fund, Inc.


Date: April 23, 2007


Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, this report has been signed below by the
following persons on behalf of the registrant and in the capacities and on
the dates indicated.


By:    /s/ Robert C. Doll, Jr.
       -----------------------
       Robert C. Doll, Jr.,
       Chief Executive Officer of
       BlackRock Senior High Income Fund, Inc.


Date: April 23, 2007


By:    /s/ Donald C. Burke
       --------------------
       Donald C. Burke,
       Chief Financial Officer of
       BlackRock Senior High Income Fund, Inc.


Date: April 23, 2007