UNIVERSITY OF CALIFORNIA COLLEGE OF PHARMACY UNIVERSITY OF CALIFORNIA MEDICAL CENTER SAN FRANCISCO 22, CALIFORNIA Dece 28 1951 Dear Doctor Lederberg, Oar studies on Cepharantine camme to a stop because we head used up the small amount we had avallable, and were asked an 6xvravagant price for more material. We feel very sorry not to be able to send you even the small amount Yow need«” With our best wishes for the New tear L Je Dufrenoy a,