UNIVERSITY OF CALIFORNIA, SAN FRANCISCO BERKELEY * DAVIS * IRVINE * LOS ANGELES * RIVERSIDE * SAN DIEGO + SAN FRANCISCO SANTA BARBARA * SANTA CRUZ SCHOOL OF MEDICINE LABORATORY OF RADIOBIOLOGY SAN FRANCISCO, CALIFORNIA 94143 October 20, 1980 Dr. Joshua Lederberg Rockefeller University 1230 York Avenue New York, N.Y. 10021 Dear Dr. Lederberg, Your letter concerning your appointment of or. Martin Carter prompted me to mention in addition, although I didn't wish to mix it in with a letter concerning him, the fact that I have been coming into New York on regular occasions recently to do collaborative work with Dr. James German of the New York Blood Center. He suggested that I stop by to see you one time when I was in New York and unfortunately I did not have time recently to notify you of my visit and try to see you. I will be in New York during the week of the 5th to the 12th of December and hope that if there is opportunity I could pay a brief visit with you. The stimulus = and encouragement that you gave me ten or more years ago in studying xeroderma pigmentosum was greatly appreciated at that time and this has been a continuing subject of interest ever since, and has in fact become my full-time project. My collaborations with James German are involving some clinical investigations in xeroderma we are doing as a field study in Egypt. I anticipate coming into New York at fairly regular intervals so if the time that I am next coming is unsuitable there may be another opportunity. Yours sincer rofessor of Radiology JEC/kd