APR 81965 aN ) THE PROCTER & GAMBLE COMPANY = IVORYDALE TECHNICAL CENTER CINCINNATI,OHIO 45217 April 7, 1965 Dr. Joshua Lederberg Stanford Medical Center Stanford, California Dear Dr. Lederberg: Since I will be in Colorado on April 14, 15 and 16, I have decided to go on to Palo Alto, Among other things, I hope to get a chance to talk with you about your work, anytime that suits you between 10 P.M. Friday, April 16, and 6 A.M. Tuesday, April 20. I would like to pursue your suggestions a little further and also see if I have any material that would be of interest to you. ID In addition to our recent correspondence I am quite interested in your work on retardation, although I know virtually nothing about the field yet. If I could get some references and papers from you and see your laboratories I would appreciate it. q a I will leave my office here at noon on April 14 but I will check Dr. Forsythe's office regularly for messages. Sincerely yours, uf a dU VK — Donald W. Grace jmn