Exhibit 23.1



                         INDEPENDENT AUDITORS' CONSENT



We consent to the incorporation by reference in this Registration Statement of
Marsh & McLennan Companies, Inc. on Form S-3 of our reports dated February 28,
2003, (which express an unqualified opinion and include an explanatory
paragraph relating to the adoption of Statement of Financial Accounting
Standards No. 142, Goodwill and Other Intangible Assets) and incorporated by
reference in the Annual Report on Form 10-K of Marsh & McLennan Companies, Inc.
for the year ended December 31, 2002 and to the reference to us under the
heading "Experts" in the Prospectus, which is part of this Registration
Statement.


/s/ Deloitte & Touche LLP

New York, New York
September 2, 2003