DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE PUBLIC HEALTH SERVICE NATIONAL INSTITUTES OF HEALTH BETHESDA, MARYLAND 20014 March 23, 1973 Dr. Joshua Lederberg Professor of Genetics School of Medicine Stanford University Stanford, California 94305 Dear Josh: Once again may I thank you for coming to our Tenth Anniversary Ceremony and delivering your stimulating ideas to our audience. I understand that you and others testified before Congressman Rogers the following day and I am sure you spoke with good effect. It was nice to have the opportunity to visit briefly with you. With best wishes, Yours as ever, I. ay pou DeWitt Stetten, Jr., M.D., Ph.D. Director, National Institute of General Medical Sciences