Locy Laboratories Department of Biology Northwestern University Evanston, Illinois October 26, 1953. Dr. J. Lederberg Department of Genetics University of Wisconsin Madison, Wisconsin. Dear Dr. Lederberg: Dr. Maurice Sussman has expressed to you my desire to do postdoctoral work in your laboratory at the University of Wisconsin, if all necessary conditions can be met. I would appreciate the opportunity to discuss this possibility with you. I would be able to come to Madison on any date in the near future. Sincerely, fag lem ‘Gnade, S. Gaylen Bradley.