LLCS/bm ISTITUTO DI GENETICA UNIVERSITA DI PAVIA VIA SANT' EPIFANIO, 14 PAVIA Pavia, January 22, 1962 Prof. Joshua Lederberg Stanford University Medical Center Department of Genetics P a 1 o A 1 t o, Calif. Dear Joshua, I would be pleased if you could send me your good old female W 2401, if I am not mistaken, as we hope to start some micromanipulation. Yours ever I L.L. Cavalli-Sforza.