December 17, 1953

Dr. Elsa L, Sonzalez
c/o Dr. &. S, G. Barron
Department of Medicine
University of Chicago
Chicago 37, Tllinois

Dear Dr, Gonzalez:

I have your letter of December 13. I am sorry that we
were not able to meet each other on the occasion of your past
visit. I hope this did not inconvenience you at that time.
Of course I will be very happy to see you at any occasion
suitable to you. In general, I would prefer to have you
visit during the week rather than on the weekend, but this
is not a vital consideration, We are not planning to make
any trips away from campus in the near future. For this
reason it might perhaps be simplest for you to indicate the
time that would be most convenient for you by phone. My ex-
tension here is ],610 at the University numbcr 5-3311,but I
suggest that you call person-to-person during the day in order
to insure reaching me,

Yours sincerely,

Joshua Lederberg,
Associate Professor of Genetics