Exhibit 24

                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Lewis W. Bernard
                  ------------------------------------
                  Lewis W. Bernard





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Mathis Cabiallavetta
                  ------------------------------------
                  Mathis Cabiallavetta





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Peter Coster
                  ------------------------------------
                  Peter Coster





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Charles A. Davis
                  ------------------------------------
                  Charles A. Davis





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Robert F. Erburu
                  ------------------------------------
                  Robert F. Erburu





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ J. W. Greenberg
                  ------------------------------------
                  J. W. Greenberg





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Ray J. Groves
                  ------------------------------
                  Ray J. Groves





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Stephen R. Hardis
                  ------------------------------------
                  Stephen R. Hardis





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Gwendolyn S. King
                  ------------------------------
                  Gwendolyn S. King





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ The Rt. Hon. Lord Lang of Monkton
                  ------------------------------------------
                  The Rt. Hon. Lord Lang of Monkton





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Lawrence J. Lasser
                  ------------------------------------
                  Lawrence J. Lasser





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ David A. Olsen
                  ------------------------------------
                  David A. Olsen





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ John D. Ong
                  ------------------------------
                  John D. Ong





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ Adele Simmons
                  ------------------------------------
                  Adele Simmons





                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ John T. Sinnott
                  ------------------------------------
                  John T. Sinnott












                                POWER OF ATTORNEY


      The undersigned, a Director and/or Officer of Marsh & McLennan Companies,
Inc., a Delaware corporation ("MMC"), does hereby constitute and appoint any one
of J. W. Greenberg, Sandra S. Wijnberg and William L. Rosoff to be the
undersigned's agent and attorney-in-fact, each with the power to act fully
hereunder without the other and with full power of substitution, to act in the
name and on behalf of the undersigned:

      To sign or to transmit electronically in the name and on behalf of the
      undersigned, as a Director and/or Officer of MMC, and file with the
      Securities and Exchange Commission on behalf of MMC an Annual Report on
      Form 10-K for the year ended December 31, 2000, any registration
      statements or prospectuses for the registration of MMC's common stock and
      related interests to be issued pursuant to MMC's employee benefit,
      compensation and stock plans, any registration statements for the
      registration of MMC's common stock for issuance in connection with future
      acquisitions or for resale by the holders thereof who acquired or will
      acquire such stock in connection with past or future acquisitions, and any
      amendments or supplements to such Annual Report on Form 10-K and such
      registration statements; and

      To execute and deliver, either through a paper filing or electronically,
      any agreements, instruments, certificates or other documents which they
      shall deem necessary or proper in connection with the filing of such
      Annual Report on Form 10-K, registration statements and prospectuses and
      amendments or supplements thereto and generally to act for and in the name
      of the undersigned with respect to such filings as fully as could the
      undersigned if then personally present and acting.

      IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney
effective the 15th day of March, 2001.



                  /s/ A.J.C. Smith
                  ------------------------------
                  A.J.C. Smith