STATE OF NEW YORK ROSWELL PARK MEMORIAL INSTITUTE BUFFALO 3, N. Y. August 12, 1955 Dr. Joshua Lederberg Department of Genetics University of Wisconsin College of Agriculture Madison 6, Wisconsin Dear Joshua: The enclosed copy of a letter to Dr. Ceppellini answers your request of July 30th. I regret exceedingly that you came through Buffalo while I was away. Your remark that you ‘can't emulate my vacationing" calls for comment. I hid out in a log cabin in Southern Colorado with a monumental manuscript by Levan and myself, trying to see it through to publication without the admin- istrative interruptions of my present job. In this I succeeded only partly. With warm regards to both of you, Sincerely, . E en J el. T. S. Hauschka TSH sree Enclosure