June 18, 1948.
Dear Werner,
Mr. Norton Zinder has applied to work with me on a fellowship that happens still to be open, and mentioned that he had assisted with you. Can you write me anything of your impressions of this man that might help me to evaluate him? Your prompt cooperation would be appreciated, for time is very short indeed.
Write me how you are getting along at Caltech, and please do not forget to keep me on your reprint mailing list.
With best regards,
Yours sincerely,
Joshua Lederberg
Assistant Professor of Genetics.