CALIFORNIA INSTITUTE OF TECHNOLOGY
PASADENA, CALIFORNIA

DIVISION OF BIOLOGY

November 16, 1959

Prof. J. Lederberg
Department of Genetics
Stanford University
Stanford, California

Dear Josh,

When I last saw you, in September, I warned you that I was going to
invite you down here to give a talk to our General Biology Seminar some
time. This is the invitation, and I hope you will be able to accept.

The Seminar is held on Tuesdays at 4 P. M. The audience is a general
one--representative of our entire Division. As of now, I have open dates

in February, the first half of March, and most of May. I would appreciate
hearing as soon as convenient whether you can come and, if so, which of
these times you would prefer.

We can give you an honorarium of $100 in lieu of travel expenses and,
in addition, put you and Esther up at the Athenaeum as guests of the Divi-
sion.

With best regards,

Norman Horowitz