August 5, 1966

Dr. W. Roy Breg, Jr.

Department of Pediatrics

Yale University School of Medicine
New Haven, Connecticut

Dear Dr. Breg:

I was most interested to read the report of your work in Medical World
News of July 29. Has there been scientific publication of the material
elsewhere. If so, I would appreciate having the reference data or a
reprint.

Sincerely yours,

Joshua Lederberg
Professor of Genetics