December 11, 1956

Air Mail

Dr. F. 4. C. Crick

Medical Research Council Unit
Cavendish Laboratory
Cambridge

England

Dear Francis:
Thank you for your nice letter of December 6,

We are planning to be in Greet 3ritain between
March 18 and March 29, Our time before the meeting is
pretty well occupied already and we will have to fly
back before the end of March in order to avoid the
high season fares. Wowever, if we can find any chance
to drop un to Cambridge we will not neglect the
opportunity.

I had not yet seen your note in Nature on the
amino acid assay. However, I am looking forward to
seeing a more complete description of the base sequence
in the corresoonding zene,

Yours sincerely,

Josma Lederberg
Professor of Senetics

JL:nhn