POWER OF ATTORNEY

     For Executing Forms 3, 4 and 5 and Form 144



 Know all by these presents, that the undersigned hereby constitutes and

appoints each of Charles C. Cutrell, III and Richard P. Jacobson (signing

singly) as the undersigned's true and lawful attorneys-in-fact to:



 (1) execute for and on behalf of the undersigned, in the undersigned's

     capacity as an officer and/or director of State Street Corporation

     (the "Company"), Forms 3, 4 and 5 and/or Form 144 in accordance

     with Section 16(a) of the Securities Exchange Act of 1934 and the

     rules thereunder and Rule 144 of the Securities Act of 1933,

     respectively;



 (2) do and perform any and all acts for and on behalf of the undersigned

     which may be necessary or desirable to complete the execution of any

     such Form 3, 4 and 5 and Form 144 and timely file such form with the

     United States Securities and Exchange Commission and any other

     authority; and



 (3) take any other action of any type whatsoever in connection with the

     foregoing which, in the opinion of such attorney-in-fact, may be of

     benefit to, in the best interest of, or legally required by, the

     undersigned, it being understood that the documents executed by such

     attorney-in-fact on behalf of the undersigned pursuant to this Power

     of Attorney shall be in such form and shall contain such terms and

     conditions as such attorney-in-fact may approve in such attorney-

     in-fact's discretion.



 The undersigned hereby grants to each attorney-in-fact full power and

authority to do and perform all and every act and thing whatsoever requisite,

necessary and proper to be done in the exercise of any of the rights and powers

herein granted, as fully to all intents and purposes as the undersigned might

or could do if personally present, with full power of substitution or

revocation, hereby ratifying and confirming all that such attorney-in-fact, or

such attorney-in-fact's substitute or substitutes, shall lawfully do or cause

to be done by virtue of this power of attorney and the rights and powers herein

granted.  The undersigned acknowledges that the foregoing attorneys-in-fact,

in serving in such capacity at the request of the undersigned, are not

assuming, nor is the Company assuming, any of the undersigned's

responsibilities to comply with Section 16 of the Securities Exchange Act of

1934 or Rule 144 of the Securities Act of 1933.



 This Power of Attorney shall remain in full force and effect until the

undersigned is no longer required to file Forms 3, 4 and 5 and Form 144 with

respect to the undersigned's holdings of and transactions in securities issued

by the Company, unless earlier revoked by the undersigned in a signed writing

delivered to the foregoing attorneys-in-fact.



 IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney

to be executed as of this 15th day of July, 2004.





      /s/ Nader F. Dareshori

    ______________________________

    Nader F. Dareshori