EXHIBIT 99.1

December 20, 2002



J. Peter Pierce                                   BY TELECOPIER:  (610) 862-2120
Eight Tower Bridge, Suite 140                     ------------------------------
161 Washington Street                             AND OVERNIGHT DELIVERY
Conshohocken, PA  19428                           ----------------------


Dear Peter:

       We were very surprised to learn that you had directed your attorneys,
Cozen O'Connor, to issue the press release that the firm released on December
17, 2002, describing the two lawsuits filed by you, and people and entities
related to you, against Iron Mountain Incorporated (the "Company") and certain
of its officers and directors. You certainly have the right to commence
litigation. However, we believe that the two cases you have filed are utterly
without merit and have no purpose other than to deflect attention from the facts
which led to the filing by the Company of actions against you. Your further
election to publicize the dispute at a time when you knew the Company was
selling senior subordinated notes in a public offering strikes us as another
flagrant failure on your part to act in the best interests of the Company and in
accordance with your fiduciary duties.

       The Board of Directors (including yourself) unanimously approved the
financing on November 27, and again expressed support for it at the December 5
Board meeting for the reasons discussed at the meetings. Iron Mountain, of
course, promptly filed an 8-K on December 17 referring to the litigation, so no
issue of disclosure to investors was involved. Your directing Cozen O'Connor to
issue the press release on the 17th could have had no purpose other than to
interfere with the financing or to otherwise damage the Company.

       Your causing the issuance of the press release leads us to conclude that
no purpose can possibly be served by your continued presence on the Board; and
in fact, your continued participation in directing the management of the Company
may adversely affect it. Therefore, we request that you resign from the Board
immediately.


Very truly yours,


/s/ C. Richard Reese
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C. Richard Reese
Chairman of the Board

PLEASE SEE PAGE 2 FOR OTHER SIGNATORIES.





SIGNATORIES CONTINUED:



/s/ CLARKE H. BAILEY
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Clarke H. Bailey



/s/ CONSTANTIN R. BODEN
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Constantin R. Boden



/s/ KENT DAUTEN
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Kent Dauten



/s/ EUGENE B. DOGGETT
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Eugene B. Doggett



/s/ B. THOMAS GOLISANO
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B. Thomas Golisano



/s/ JOHN F. KENNY, JR.
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John F. Kenny, Jr.



/s/ ARTHUR D. LITTLE
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Arthur D. Little



/s/ VINCENT J. RYAN
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Vincent J. Ryan