Genetics Department
University of Wisconsin
Madison, Wisconsin

December 10, 1953

Mr. Francois Jacob
Pasteur Institute
28 Ru du Dr. Roux
Paris 15

FRANCE

My dear Jacob:

This is just to acknowledge the safe arrival of
the cultures that you sent to us under the labels Y¥10
and W705. They appear to be in good order except that
W705 has become maltose positive. This alteration in
stock cultures is not a new experience to us.

With best season's greetings and regards to every-
one.

Yours sincerely,

Joshua Lederberg
[mg

P.S. Your letter just arrived. The girl you are asking about

is Naomi Cohn, and you can address her c/o the Department of

Bacteriology here. I have persomlly had very little contact
with this work and so can offer no opinion on it.’