THE UNIVERSITY OF CHICAGO CHICAGO 37° ILLINOIS THE ENRICO FERMI INSTITUTE FOR NUCLEAR STUDIES January 18, 1957. Dr. Joshua Lederberg Professor of Genetics The University of Wisconsin Madison 6, Wisc. Dear Lederboerg, Iam very grateful for your letter of December 16th, and I do appreciate the invitation which you have extended to me. My schedule for the next few months is so unsettled and in addition it will remain subject to sudden changes and therefore I am not able to accept your invitation. However, when I am back in 6hicago for an extended period of time I might call you and maybe come up for a day or two and talk with you and a few others informally about topics of mutual interest. In the meantime, if you come to Chicago or New York please give me a call as I would like to discuss with you a gort of “project that I have been discussing with several others. - Novick will know where you can reach me. Please convey to the other members of tho Lectureship Committee my regret for not being able to come during this academic year. Sincerely, ee ele’ i eS “ee Leo Szilard