UNIVERSITY OF CALIFORNIA SCHOOL OF PUBLIC HEALTH Cc BERKELEY 4, CALIFORNIA May 26, 1953 Air Mail Dr. J. Lederberg Department of Genetics University of Wisconsin Madison, Wisconsin Dear Dr. Lederberg: I expect to arrive in Madison on North Central Flight 125 at 11:10 P.M. Sunday, May 31, and will be in Madison all day Monday. I will ring you at the laboratories at 10 o'clock Monday morning. Could you please arrange hotel accommodations for me for Sunday and Monday nights and leave in- formation at the airport desk? With many thanks. Yours sincerely, Tart Av FFrav Frank Fenner, M.D.