CONSENT OF INDEPENDENT ACCOUNTANTS - ---------------------------------- November 12, 1998 The Board of Directors PDR Automated Systems and Publications, Inc. 800 Corporate Drive, Suite 200 Lexington, KY 40503 To the Board of Directors: We agree to the inclusion in the Form 8-K/A (Amendment No. 1) of Interleaf, Inc., dated September 9, 1998, of our independent auditors' report and independent accountants' compilation report, dated September 17, 1998, on our audit of the financial statements of PDR Automated Systems and Publications, Inc., as of June 30, 1998, and December 31, 1997, and for the six months ended June 30, 1998, and for the year ended December 31, 1997, and our compilation of the financial statements for the six months ended June 30, 1997. Yours truly, /s/ Dulworth, Breeding & Karns, LLP Dulworth, Breeding & Karns, LLP