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                                                               Exhibit 23.6     
    
October 11, 1996     

TO:

Pierce Leahy Corp.                       CIBC Wood Gundy Securities Corp.
631 Park Avenue                          1325 Avenue of the Americas, 22nd Floor
King of Prussia, PA 19406                New York, NY 10019
    
Certain subsidiaries of Cushman & Wakefield, Inc. identified below ("C&W")
hereby consent to the reference to the appraisal reports described below in the
Amendment No. 2 to Form S-4 Registration Statement. An authorized representative
of C&W has approved the text of the reference.     

Appraisal reports to be referenced:

Appraisals as of June 6, 1996 of property described as follows: 3881 Old Gordon
Road, N.W., Atlanta, Georgia, issued by Cushman & Wakefield of Georgia, Inc.

This agreement shall inure to the benefit of Pierce Leahy Corp., CIBC Wood Gundy
Securities Corp., their successors and assigns, and be binding on C&W and its
successor and assigns.

Very truly yours,

Cushman & Wakefield of Georgia, Inc.
