April 11, 1952

Dr. Igor N. Asheshov
New fork Botanical Garden
Bronx Park, New York 58, N.Y.

Dear Dr, Asheshov:

Thank you for your letter of the Sth, and Boulgakov's address.
As it happens, a letter that I had long ago mis-addressed to Boulgakov
at the Pasteur Institut finally was forwarded to him. He has written
very cordially, and has shipped the phages with which I was concerned.

I am very pleased, nevertheless, to have had the occasiom to
open a discussion of therapy of lysogenic bacteria. Although we are
not unoccupied with other matters, I think we should be able to find
time to test a few compounds on our K-12 E. coli / lambda system.
If you have some promising antivirotics that you would be willing
to supply, we should be pleased to have them for this purpose. We
will, of course, keep you well informed of any results.

Unfortunately, we will not be travelling East for some time to
come, and will miss this opportunity of a direct conversation.

Yours sincerely,

Joshua Lederberg