CALIFORNIA INSTITUTE OF TECHNOLOGY PASADENA, CALIFORNIA DIVISION OF BIOLOGY November 27, 1959 Prof. J. Lederberg Genetics Department Stanford University Medical Center Palo Alto, Calif. Dear Josh, Thanks for your note. I am putting you down for March 8. If you find you can't make it, let me know ag soon as possible, and I'll try to arrange another date. Beets expects to be here on the 8th. You don't have to send a title until the middle of February. Either bacterial genetics or exobiology would be fine. It would be nice if you could spend two or three days here. Then we might have a chance to hear what Esther is doing. I would schedule a Genetics Seminar on Monday or Wednesday, March 7 or 9, for her to speak at, if she is willing. Let me know about this when you write next. Best regards, hit. Norman Horowitz