POWER OF ATTORNEY

EXHIBIT 24


POWER OF ATTORNEY


I hereby appoint Richard B. Alsop, Judith A. Witterschein, Mason
A. Reeves, Ana Silva, Pia K. Thompson and Margaret E. Nelson to act
individually as my agent and attorney-in-fact for the purpose of
completing, executing and filing on my behalf with the Securities and
Exchange Commission, the New York Stock Exchange, Inc. or any other
exchange or self regulatory body, any Form 3 "Initial Statement of
Beneficial Ownership of Securities", Form 4 "Statement of Changes in
Beneficial Ownership of Securities", Form 5 "Annual Statement of
Beneficial Ownership of Securities", Form 144 "Notice of Proposed Sale
of Securities", or any other similar form to report securities
ownership that may, in the opinion of any of them be necessary, with
respect to any transaction in securities of Merrill Lynch & Co., Inc.

Nothing herein shall relieve me of the responsibility for the
accuracy of the information and representations contained in any Form
3, Form 4, Form 5, Form 144 or other similar form completed, executed
and filed pursuant to this power of attorney.

This power of attorney shall supersede all similar prior powers
of attorney and will remain effective as to the agents and
attorneys-in-fact referred to above until I revoke or amend it by
written notice to such persons.




/s/ Judith Mayhew Jonas
Judith Mayhew Jonas
State of New York
County of New York

Sworn to before me this 27th
day of September, 2006.

/s/ Taquana M. Bailey
Notary

Taquana M. Bailey
Notary Public, State of New York
No. 01BA6012141, Qualified in Nassau County
Certificate Filed in New York County
Commission Expires August 17, 2010