OCT 23 +875 | EDUCATIONAL TESTING SERVICE PRINCETON, N.J. 08540 Area Code 609 921 - 9000 CABLE-EDUCTESTS¥VC Division of Psvchalogical Slidies October 15, 1975 Dr. Joshua Lederberg Department of Genetics School of Medicine Stanford University Palo Alto, CA 94305 Dear Josh: Just a quick note to thank you for the additional comments on the XYY paper-~and to repeat my thanks for the reactions you gave me in Stanford, as well as for your warm hospitality. The paper is now going through what I hope will be a final draft, if there is such a thing. It was really great seeing you both,getting to see David at his big~boy stage and meeting your new daughter. We are truly sorry that this kind of thing happens so infrequently. Our best to all Lederbergs. a Cordially, \ Herman A. kin eon a a HAW: pet