DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE PUBLIC HEALTH SERVICE NATIONAL INSTITUTES OF HEALTH OLiver 6-4000 July 26, 1961 Professor J. Lederberg Department of Genetics Stanford University Palo Alto, California Dear Josh: BETHESDA 14, MD. I shall be at the Center for Behavioral Sciences from August 12 to September 3. I hope you will be there sometime during those three weeks, because I'd like to talk with you about the origin of life and about citation indexes. I want to know of any developments you can report along the lines of simple code-carrying polymers. I also want to know more about your objections to my own hypothesis. If you think my system could not accumulate information, or would not provide for reproduction of mutations, I hope to show you how it can do both of these things. Since NIH will not support my experiments, I am planning to use my sabbatical a year from now to get something started. Sincerely yours, Lode Gordon Allen National Cancer Institute Nationa] Heart Institute National Institute of Allergy and Infectious Diseases National Institute of Arthritis and Metabolic Diseases National Institute of Dental Research National Institute of Mental Health National Institute of Neurological Diseases and Blindness The Clinical Center Division of Biologics Standards Division of General Medical Sciencer Division of Research Grants Division of Research Services Notayes 'wa774