JAN 2 5 1965 HARVARD UNIVERSITY THE BIOLOGICAL LABORATORIES 16 DIVINITY AVENUE CAMBRIDGE 38, MASSACHUSETTS January 19, 1965 Professor Joshua Lederberg Department of Genetics Stanford University School of Medicine Palo Alto, California 94304 Dear Joshua: Thanks so very much for your warm note. It was a particular pleasure to hear from you, as our paths have not crossed for some time. I am cer- tainly looking forward to this some- what cryptic assignment. I hope to find out more about it in the months ahead. Yours sincerely, Maen! dmg Kenneth V. Thimann KVT: RLS