THE WEIZMANN PVSTITUTe Gb SCIENCE PRI. M1314 REHOVOTH + ISRAEL Please address reply to: MEYER W. WEISGAL 515 PARK AVENUE Chairman, Executive Council New York 22, New York Plaza 2-1300 May 18, 1961 Professor Joshua Lederberg Department of Genetics Stanford University Medical Center Palo Alto, California Dear Professor Lederberg: Thank you for your letter of May 9th which followed me to New York. I shall keep on hoping that the day will come. Sur invitation has no statute of limitations. Do give us some advance notices so that I can make sure to be around when you get there. With best wishes and kindest regards, / Very cor jallyy7 b. MWWs jm