INSTITUTO DE BIOLOGIA Y MEDICINA EXPERIMENTAL OBLIGADO 2490 December 6th, 1962 BUENOS AIRES Dr. Marshall W. Nirenberg National Heart Institute National Institutes of Health Bethesda 14, Md. U.S.A. Dear Dr. PJirenbergt Many thanks for your curriculum vitae and the brief resume of your work concerning the genetic code and reprints. I was born on April 10th like you. Xith best regards, I am, Sinceraly yours, Bernar