SECURITIES AND EXCHANGE COMMISSION
                          WASHINGTON, D. C. 20549


                                FORM 10-K/A

                     FOR ANNUAL AND TRANSACTION REPORTS
                  PURSUANT TO SECTIONS 13 OR 15(d) OF THE
                      SECURITIES EXCHANGE ACT OF 1934

(Mark One)
|X| ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

                For the fiscal year ended December 31, 2000
                                                       OR
|_| TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
    SECURITIES EXCHANGE ACT OF 1934

       For the transition period from _____________ to _____________


                       Commission file number 0-22206



                            NIAGARA CORPORATION
                          -----------------------
           (Exact name of registrant as specified in its charter)

                 Delaware                                 59-3182820
      (State or Other Jurisdiction of                  (I.R.S. Employer
      Incorporation or Organization)                  Identification No.)

  667 Madison Avenue, New York, New York                     10021
  --------------------------------------                     -----
 (Address of Principal Executive Offices)                  Zip Code

     Registrant's telephone number, including area code: (212) 317-1000
      Securities registered pursuant to Section 12(b) of the Act: None

        Securities registered pursuant to Section 12(g) of the Act:
                  Common Stock, par value $.001 per share

         Indicate by check mark whether the registrant (1) has filed all
reports required to be filed by Section 13 or 15(d) of the Securities
Exchange Act of 1934 during the preceding 12 months (or for such shorter
period that the registrant was required to file such reports), and (2) has
been subject to such filing requirements for the past 90 days. Yes X  No ___.

         Indicate by check mark if disclosure of delinquent filers pursuant
to Item 405 of Regulation S-K is not contained herein. |X|

         As of April 26, 2001, the aggregate market value of the voting
stock held by non-affiliates of the registrant was approximately
$9,410,601 (assumes the registrant's officers, directors and all
stockholders holding 5% of the outstanding shares are affiliates).

         There were 8,363,817 shares of the Registrant's Common Stock
outstanding as of April 26, 2001.

         Documents Incorporated by Reference: None.



         This filing amends the previously filed Annual Report on Form 10-K
of Niagara Corporation ("Niagara") for the fiscal year ended December 31,
2000 (the "Form 10-K"). As stated in the Form 10-K, the Items comprising
Part III thereof would be filed by amendment or incorporated by reference
from Niagara's Proxy Statement for its 2001 Annual Meeting of Stockholders.


                                  PART III


ITEM 10.          DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT


Directors

         Certain information with respect to the directors of Niagara is
set forth below.

         Michael J. Scharf, 58, has been the Chairman of the Board,
President and Chief Executive Officer of Niagara since its inception in
1993. He has also served as the Chairman of the Board and Chief Executive
Officer of Niagara LaSalle Corporation ("Niagara LaSalle") and LaSalle
Steel Company ("LaSalle") since the dates of their acquisition by Niagara
and Niagara LaSalle, respectively, and currently holds various other
positions with such subsidiaries. Since March 1999, Mr. Scharf has also
been the Chairman of the Board and a director of Niagara LaSalle (UK)
Limited ("Niagara UK"), a subsidiary of Niagara which acquired eight U.K.
steel bar businesses during May 1999. Since August 1994, Mr. Scharf has
been a director of Maxcor (see below), and until August 1997, was also a
Vice President of Maxcor and its Secretary and Treasurer. Since August
1989, Mr. Scharf also has been a private investor. Mr. Scharf received an
A.B. degree from Princeton University and an M.B.A. from the Harvard
Business School.

         Gilbert D. Scharf, 52, has been the Secretary and a director of
Niagara since its inception, and until March 1998, was also a Vice
President of Niagara and its Treasurer. He has also served as a director of
Niagara LaSalle and LaSalle since the dates of their acquisition by Niagara
and Niagara LaSalle, respectively. Since August 1994, Mr. Scharf has been
Chairman of the Board, President and Chief Executive Officer of Maxcor
Financial Group Inc., a holding company with operating subsidiaries in the
financial services industry ("Maxcor"), and, currently holds the same
positions with Euro Brokers Investment Corporation, a financial services
company and subsidiary of Maxcor, as well as of a number of its
subsidiaries. Since 1989, Mr. Scharf also has been a private investor and
Chairman of Scharf Advisors, Inc. Mr. Scharf received a B.A. degree from
Duke University.

         Frank Archer, 64, has been a director of Niagara since May 1998.
Mr. Archer has been the President and a director of Niagara LaSalle since
its formation in 1986 and the President and a director of LaSalle since
April 1997 when it was acquired by Niagara LaSalle. Mr. Archer received a
Certificate in Tool and Die Design from the Cleveland Engineering Institute
and an Associates degree from John Carroll University. He also attended the
Advanced Management Program at the Harvard Business School.

         Gerald L. Cohn, 72, has been a director of Niagara since its
inception. Mr. Cohn is a private investor who, since 1968, has been
involved in the financing and acquisition of companies, including AgMet,
Inc., a refiner of precious metals and a recycler of ferrous and
non-ferrous metals, Cadillac Cable Corp., a multi-plant manufacturer of
copper and aluminum building wire, Pepco, Inc., a ferrous and non-ferrous
metal recycler and ferrous stevedoring and shipping company, and DVI, Inc.,
a health service finance company for which Mr. Cohn currently serves as a
financial advisory consultant and a director. He is also a director of
Diametrics Medical, Inc. and Frazier Healthcare Investments, L.P. Mr. Cohn
attended Penn State University. He is a member of the Board's Audit
Committee and the Chairman of its Compensation Committee.

         Andrew R. Heyer, 43, has been a director of Niagara since its
inception. Since August 1995, Mr. Heyer has been a Managing Director of
CIBC World Markets Corp., an investment banking firm, co-head of its
Leveraged Finance Group (and its predecessor) and co-head of CIBC World
Markets High Yield Merchant Banking Funds. Since July 1998, Mr. Heyer also
has been on the Investment Committee of Caravelle Advisors, L.L.C., the
investment advisor to Caravelle Investment Fund, L.L.C. and Caravelle
Investment Fund II, L.L.C., each of which is a collateralized debt
obligation fund. In addition, since February 2000 he has been a member of
Trimaran Fund Management, L.L.C., the investment advisor to Trimaran Fund
II, L.L.C., a private equity fund. Mr. Heyer is also the Chairman of Hain
Food Group, Inc. and a director of Hayes Lemmerz International, Inc. and
Fairfield Corporation. Mr. Heyer received a B.S. degree and an M.B.A. from
the Wharton School of the University of Pennsylvania. He is the Chairman of
the Board's Audit Committee.

         Douglas T. Tansill, 62, has been a director of Niagara since March
1998. Since November 2000, Mr. Tansill has been an Advisor to UBS Warburg,
an investment banking fund. From December 1994 through August 1998, Mr.
Tansill was a Managing Director, and from August 1998 through November
2000, he was an Advisory Director, in the Investment Banking Division at
Paine Webber Incorporated, an independent national securities firm. Mr.
Tansill received a B.A. degree from Trinity College and an M.B.A. from the
Harvard Business School. He is a member of the Board's Audit and
Compensation Committees.


Executive Officers

         Set forth below is certain information with respect to each of the
executive officers of Niagara who is not also a director of Niagara.

         Raymond Rozanski, 55, has been a Vice President and the Treasurer
of Niagara since March 1998, Executive Vice President, Secretary, Treasurer
and a director of Niagara LaSalle since its formation and Executive Vice
President, Treasurer and a director of LaSalle since it was acquired by
Niagara LaSalle. Mr. Rozanski has also been the Secretary and a director of
Niagara UK since March 1999. Mr. Rozanski received a B.S. degree in
Business Administration from the State University of New York at Buffalo.

         Marc J. Segalman, 42, has been a Vice President and the General
Counsel of Niagara since September 1997, and since March 2000, has been
Executive Vice President and General Counsel of Niagara LaSalle and
LaSalle. From October 1987 to August 1997, Mr. Segalman was an attorney in
the mergers and acquisitions group of the law firm of Skadden, Arps, Slate,
Meagher & Flom LLP. Mr. Segalman received an A.B. degree from Dartmouth
College and a J.D. degree from the Boston University School of Law.

         Michael J. Scharf and Gilbert D. Scharf are brothers. There are no
other family relationships among Niagara's directors or executive officers.


Section 16(a) Beneficial Ownership Reporting Compliance

         Section 16(a) of the Securities Exchange Act of 1934, as amended
(the "Exchange Act") requires Niagara's directors, officers and persons who
beneficially own more than 10% of a registered class of Niagara's equity
securities ("10% stockholders") to file with the Securities and Exchange
Commission (the "SEC") initial reports of ownership and changes in
ownership in Niagara's equity securities and to furnish Niagara with copies
of all such forms. Based solely on its review of copies of such forms
received by it, and written representations that no other reports were
required, Niagara believes that all such Section 16(a) filing requirements
applicable to its directors, officers and 10% stockholders with respect to
Niagara's fiscal year ended December 31, 2000 and its prior fiscal years
were complied with on a timely basis.

ITEM 11.          EXECUTIVE COMPENSATION


Summary Compensation Table

         The following table summarizes compensation paid by Niagara and
its subsidiaries during each of the last three fiscal years to its Chief
Executive Officer and its other executive officers as of December 31, 2000
(collectively, the "Named Executive Officers").



<TABLE>
<CAPTION>



         Executive Officer               Year        Annual Compensation    Long-Term Compensation
         -----------------               ----        -------------------    Securities Underlying        All Other
                                                Base Salary     Bonus(1)    Options (No. of Shares)   Compensation(2)
                                                -----------     --------    -----------------------   ---------------
<S>                                      <C>     <C>             <C>                                    <C>
Michael J. Scharf                        2000    $  480,000      $480,000             --                $   12,563
  Chairman, Chief Executive Officer      1999    $  480,000            --          600,000              $   11,857
    and President                        1998    $  480,000      $200,000             --                $   12,074

Frank Archer                             2000    $  225,000      $125,000             --                $   12,563
President of Niagara LaSalle and LaSalle 1999    $  225,000            --          100,000              $   12,000
                                         1998    $  225,000      $150,000             --                $   13,940

Raymond Rozanski                         2000    $  225,000            --             --                $   12,563
   Vice President and Treasurer          1999    $  225,000            --          100,000              $   12,000
                                         1998    $  225,000      $150,000             --                $   13,904

Marc J. Segalman                         2000    $  225,000       $75,000             --                $   12,563
   Vice President and General Counsel    1999    $  225,000            --             --                $   12,000
                                         1998    $  225,000       $50,000           25,000 (3)          $    6,882

---------------------------

(1)    Paid in subsequent year.

(2)    Amounts include (i) employer matching and additional contributions
       under the Niagara LaSalle 401(k) Retirement Savings Plan equal to a
       100% match for the first 3% of employee contributions, a 50% match
       for the next 2% of employee contributions and an additional employer
       contribution equal to 2% of earnings, subject, in each case, to
       certain limitations, (ii) annual premiums ranging from $1,080 to
       $1,255 on life insurance policies providing coverage for such
       officers of two times annual salary, up to a maximum of $250,000 and
       (iii) annual premiums ranging from $1,095 to $1,283 on long-term
       disability policies providing for, in the event of disability,
       two-thirds of monthly earnings, up to a maximum of $10,000 per
       month. Certain perquisites and other personal benefits that
       aggregate in each case to less than the lesser of either $50,000 or
       10% of the Named Executive Officer's annual salary and bonus have
       been omitted pursuant to Item 402(b)(2)(iii)(C)(1) of Regulation
       S-K.

(3)    Reflects the repricing on December 15, 1998 of an option granted on
       September 8, 1997.
</TABLE>


Stock Option Grants

         No stock options were granted to any of the Named Executive
Officers during 2000.


Stock Option Exercises and Fiscal Year End Values

         No stock options were exercised by any of the Named Executive
Officers during 2000.

         The following table sets forth, for each Named Executive Officer,
the number of shares of Niagara Common Stock underlying the total number of
stock options held by him at Niagara's December 31, 2000 fiscal year end.
Based on the closing price for Niagara Common Stock as of such date, none
of the stock options granted by Niagara to its Named Executive Officers
were in-the-money.


                 EXERCISABLE/UNEXERCISABLE STOCK OPTIONS AT
                              FISCAL YEAR END


                                           Number of Shares Underlying
                                         Options at 2000 Fiscal Year End
                                         -------------------------------
           Name                         Exercisable        Unexercisable
           ----                         -----------        -------------

           Michael J. Scharf             340,000              560,000

           Frank Archer                  260,000               90,000

           Raymond Rozanski              260,000               90,000

           Marc J. Segalman               40,000               10,000


Pension Plan Table

      The following table sets forth estimated annual benefits payable to
Michael Scharf upon his retirement from Niagara under his Employment
Agreement (see "EXECUTIVE COMPENSATION-Employment Contracts - Michael
Scharf") based upon estimates of his Final Average Pay (as described below)
and years of service with Niagara.


                             PENSION PLAN TABLE

                              Years of Service
                              ----------------

   Final Average Pay              10                  15                 20
   -----------------              --                  --                 --
        $500,000               $125,000            $187,500           $250,000
        $550,000               $137,500            $206,250           $275,000
        $600,000               $150,000            $225,000           $300,000
        $650,000               $162,500            $243,750           $325,000
        $700,000               $175,000            $262,500           $350,000
        $750,000               $187,500            $281,250           $375,000
        $800,000               $200,000            $300,000           $400,000
        $850,000               $212,500            $318,750           $425,000
        $900,000               $225,000            $337,500           $450,000
        $950,000               $237,500            $356,250           $475,000
      $1,000,000               $250,000            $375,000           $500,000


      Mr. Scharf's Employment Agreement provides that he will be entitled,
commencing on the first day of the month following his termination of
employment with Niagara, to receive an annual retirement benefit equal in
amount to his Final Average Pay, multiplied by the product of his years of
service with Niagara and 2.5%, with 50% of such annual amount to be paid to
his surviving spouse during her lifetime. Final Average Pay is defined in
Mr. Scharf's Employment Agreement to mean the highest average of his
combined annual salary and bonus over a three-consecutive-year period
during the ten-year period immediately preceding the year in which he
incurs a termination of his employment with Niagara. Accordingly, Mr.
Scharf's current Final Average Pay is $706,667. He has 7.67 years of
service with Niagara as of December 31, 2000. The estimated annual benefits
set forth in the Pension Plan Table are computed on a straight-life annuity
basis, commencing at normal retirement age, and are not subject to any
deduction for social security or other offsetting amounts.


Employment Contracts

Michael Scharf

      Niagara and Niagara LaSalle entered into an employment agreement with
Michael Scharf dated as of January 1, 1999 (the "Employment Agreement"),
providing, among other things, that he will continue to serve as the
Chairman, Chief Executive Officer and President of Niagara and the Chairman
and Chief Executive Officer of Niagara LaSalle for the term of the
Employment Agreement. Such term will be for five years, subject to annual
one-year extensions commencing on January 1, 2002 unless Niagara or Mr.
Scharf provides the other with timely notice not to extend. The Employment
Agreement provides that Mr. Scharf will be entitled to (i) an annual base
salary ("Annual Base Salary") of not less than $480,000; (ii) a
performance-based annual incentive bonus subject to the approval of
Niagara's stockholders (which was approved at Niagara's 1999 Annual Meeting
of Stockholders); (iii) a supplemental annual retirement benefit ("SERP")
equal in amount to Mr. Scharf's Final Average Pay (as defined in the
Employment Agreement), multiplied by the product of Mr. Scharf's years of
service with Niagara and 2.5%, with 50% of such annual amount to be paid to
Mr. Scharf's surviving spouse during her lifetime; (iv) annual grants of
stock options as determined by the Compensation Committee of Niagara's
Board of Directors; and (v) medical coverage and specified fringe benefits.

      If Mr. Scharf's employment is terminated by Niagara without Cause (as
defined in the Employment Agreement) or by Mr. Scharf due to a breach of
the Employment Agreement by Niagara, Niagara will (i) provide Mr. Scharf
with a lump sum amount equal to the product of (A) the greater of three and
the number of years remaining in the term of the Employment Agreement
("Severance Multiple"), and (B) the sum of Mr. Scharf's then current Annual
Base Salary and the greater of Mr. Scharf's three-year average annual
bonus and the target bonus for the year of termination; (ii) provide Mr.
Scharf with a pro rata bonus for the year of termination; (iii) for the
number of years equal to the Severance Multiple provide Mr. Scharf with
additional years of service credit under the SERP, continued life insurance
benefits and continued exercisability of stock options; and (iv) cause all
of Mr. Scharf's outstanding equity awards to vest. Mr. Scharf would also
receive a gross-up payment for any excise tax payable under Section 4999 of
the Internal Revenue Code of 1986, as amended.

Other Named Executive Officers

      No Named Executive Officer other than Michael Scharf is a party to an
employment agreement with Niagara or any of its subsidiaries which is
currently in effect.

Compensation of Directors

      The members of the Board of Directors are compensated in a manner and
at a rate determined from time to time by the full Board. Each member of
the Board of Directors, other than Michael Scharf and Frank Archer,
received as compensation for his service as a director during 2000 (i)
$10,000 and (ii) a non-qualified stock option to purchase 10,000 shares of
Niagara Common Stock granted on April 3, 2000 and exercisable at $5.50 per
share (collectively, the "Director Options"). Each Director Option became
exercisable as to 2,000 of the underlying shares on the date of grant and
becomes exercisable as to an additional 2,000 of the underlying shares on
each of the first through fourth anniversaries of the date of grant,
provided the holder is then serving as a director of Niagara. Upon a
"change in control" of Niagara (as defined in Niagara's 1995 Stock Option
Plan), each Director Option will become exercisable in full.

      Niagara maintains directors and officers liability insurance which
insures directors and officers of Niagara and its subsidiaries against
certain liabilities by them while serving in such capacities, and
reimburses Niagara for certain indemnification payments made by Niagara to
directors and officers of Niagara and its subsidiaries. These policies
extend through March 12, 2002 at a total annual premium of $108,750. No
claims have been made under these policies.


Compensation Committee Interlocks and Insider Participation

      The Compensation Committee of the Board of Directors is comprised of
Gerald L. Cohn and Douglas T. Tansill. There are no "interlocks" as defined
by the SEC with respect to any director who serves or for any part of 2000
served as a member of the Compensation Committee.

ITEM 12.    SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT


      Set forth below is certain information concerning beneficial
ownership of Niagara's Common Stock as of April 26, 2001 by (i) each
director of Niagara, (ii) each Named Executive Officer, (iii) all directors
and executive officers of Niagara as a group and (iv) based on public
filings made through April 26, 2001, persons known by Niagara to be the
beneficial owners of 5% or more of the outstanding shares of Niagara Common
Stock.


                                                               Percentage
          Name (1)                  Number of Shares (2)  Beneficially Owned(3)
          ----                      ----------------      ---------------------
Michael J. Scharf...................   1,717,600(4)              19.4%
Gilbert D. Scharf...................     589,700(5)               7.0%
Raymond Rozanski....................     296,250(6)               3.4%
Frank Archer........................     290,000                  3.4%
Andrew R. Heyer.....................      66,500                    *
Gerald L. Cohn......................      53,000                    *
Marc J. Segalman ...................      40,000                    *
Douglas T. Tansill..................      38,000                    *
All directors and executive officers
 as a group (eight persons).........   3,091,050                 32.1%
Dimensional Fund Advisors Inc.(7)...     567,800                  6.8%
Schloss Entities(8).................     534,400                  6.4%
Wynnefield Group(9).................     464,619                  5.6%


*  Less than 1%

(1)    The address of each stockholder, other than Dimensional, the Schloss
       Entities and the Wynnefield Group (each as defined below), is c/o
       Niagara Corporation, 667 Madison Avenue, 11th Floor, New York, New
       York 10021.

(2)    Includes shares of Niagara Common Stock issuable upon the exercise
       of stock options held by the stockholder that are currently
       exercisable or exercisable within 60 days ("Exercisable Options").
       Beneficial Ownership of Exercisable Options is as follows: Michael
       J. Scharf -- 480,000; Gilbert D. Scharf -- 43,000; Raymond Rozanski
       -- 290,000; Frank Archer -- 290,000; Andrew R. Heyer -- 43,000;
       Gerald L. Cohn -- 43,000; Marc J. Segalman -- 40,000; Douglas T.
       Tansill -- 18,000; and all directors and executive officers as a
       group -- 1,247,000.

(3)    Based upon 8,363,817 shares of Niagara Common Stock outstanding as
       of April 26, 2001, plus any shares of Niagara Common Stock issuable
       upon the exercise of Exercisable Options held by the stockholder
       (but not by any other stockholder).

(4)    Includes 205,000 shares of Niagara Common Stock held by the Michael
       J. Scharf 1987 Grantor Income Trust and 194,500 shares of Common
       Stock held by the Scharf Family 1989 Trust. Michael Scharf is
       trustee of both of these trusts.

(5)    Includes 238,700 shares of Niagara Common Stock held by the Gilbert
       D. Scharf Living Trust, of which Gilbert Scharf is the sole trustee
       and 5,000 shares held by Gilbert Scharf for his son under the New
       York Uniform Transfer to Minor Act.

(6)    Includes 6,250 shares of Niagara Common Stock held by a trust for
       the benefit of Mr. Rozanski's children, of which Mr. Rozanski is
       trustee.

(7)    Information with respect to Dimensional Fund Advisors, Inc.
       ("Dimensional") and its holdings of Niagara Common Stock is based on
       Dimensional's Schedule 13G filed with the SEC on February 2, 2001.
       The address of Dimensional is 1299 Ocean Avenue, 11th Floor, Santa
       Monica, California 90401.

(8)    Information with respect to Walter & Edwin Schloss Associates, L.P.,
       Schloss Management Company, Walter J. Schloss and Edwin W. Schloss
       (collectively, the "Schloss Entities") and their holdings of Niagara
       Common Stock is based on the Schloss Entities Schedule 13D filed
       with the SEC on December 14, 2000. The business address of each of
       the Schloss Entities is 350 Park Avenue, New York, New York 10022.

(9)    Information with respect to Wynnefield Partners Small Cap Value,
       L.P., Wynnefield Small Cap Value Offshore Fund, Ltd. and Wynnefield
       Partners Small Cap Value, L.P. I (collectively, the "Wynnefield
       Group") and their holdings of Niagara Common Stock is based on the
       Wynnefield Group's Schedule 13D filed with the SEC on December 22,
       2001. The business address of each member of the Wynnefield Group is
       450 Seventh Avenue, Suite 509, New York, New York 10123.

ITEM 13.          CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS


       Andrew Heyer, a director of Niagara, is a Managing Director of CIBC
World Markets Corp. CIBC World Markets Corp. is a subsidiary of CIBC Inc.,
which is one of five banks who are parties to a $90 million revolving
credit and term loan agreement with Niagara LaSalle and LaSalle, the
obligations of which are guaranteed by Niagara. CIBC Inc.'s commitments
under this credit agreement total approximately $22.7 million.


                                 SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the
Securities Exchange Act of 1934, the registrant has duly caused this report
to be signed on its behalf by the undersigned, thereunto duly authorized,
on the 30th day of April, 2001.

                              NIAGARA CORPORATION



                              By: /s/ Michael J. Scharf
                                 ---------------------------------------
                                      Michael J. Scharf
                                      Chairman of the Board
                                      Chief Executive Officer and President



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


                           Chairman of the Board,
 /s/  Michael J. Scharf    Chief Executive Officer               April 30, 2001
------------------------   and President
      Michael J. Scharf


                           Vice President,
                           Chief Financial and
 /s/  Raymond Rozanski     Principal Accounting                  April 30, 2001
------------------------   Officer
      Raymond Rozanski


/s/   Gilbert D. Scharf    Secretary and Director                April 30, 2001
------------------------
      Gilbert D. Scharf


/s/   Frank Archer         Director                              April 30, 2001
------------------------
      Frank Archer


/s/   Gerald L. Cohn       Director                              April 30, 2001
------------------------
      Gerald L. Cohn


/s/    Andrew R. Heyer     Director                              April 30, 2001
------------------------
      Andrew R. Heyer


 /s/  Douglas T. Tansill   Director                              April 30, 2001
------------------------
      Douglas T. Tansill