THE WISTAR INSTITUTE THIRTY-SIXTH STREET AT SPRUCE PHILADELPHIA 4, PA. HILARY KOPROWSKI, M.D. PHONE: BARING 2-6700 DIRECTOR CABLE ADDRESS: WISTARINST December 4, 1961 Dr. Joshua Lederberg Department of Genetics Stanford University Medical Center Falo Alto, California Dear Joshua: Many, many thanks for the wonderful reception at Stanford. Perhaps that's why I always look forward to seeing the Lederbergs: they always treat me so royally! The address you requested is as foliows: Capt. Alfred M. Prince U. S. Army Medical Command Department of Virus & Rickettsial Diseases APO 343 \ San Francisco, California IT hope that you have by now received my telegram asking that you contact me at my home on Saturday (MIdway 9-1327), so that I can pick you up when you arrive in Philadelphia. I'm looking for- ward to showing you the current brand of East Coast hospitality. / Hilary KoprowsXi, M.D. I Divector HK: pon