wr “5 ¥ Gerdhom ARP 1132/79 AMERICAN PHILOSOPHICAL SOCIETY HELD AT PHILADELPHIA, FOR PROMOTING USEFUL KNOWLEDGE EXECUTIVE OFFICE—104 SOUTH FIFTH STREET, PHILADELPHIA, PENNSYLVANIA 19106 © Phone (215) MArket 7-0706 November 13, 1979 Dr. Joshua Lederberg Office of the President Rockefeller University 1230 York Avenue New York, N. Y. 10021 Dear Dr. Lederberg: I appreciate very much your kind letter, which came to me through Whitfield Bell a day or two ago, during the meeting of our Society, at which notice was taken of my approaching ninetieth birthday. I am particularly happy about your generous rating of my history of the Rockefeller Institute. I have inserted your letter in the specially-bound copy of the history which Detlev Bronk sent me when the book was published. My copy now contains appreciative letters from the three Successive presidents of the Rockefeller University, which makes it a bibliophilic treasure as well as a historical record. Cordially yours, i Gwc/t George W. Corner J _