25, RUE DU DOCTEUR ROUX (Xv' Arrond') T616phone : StGUR 01-10 Dear Dr. Nirenberg, Paris, le 20 d6cembre 1961 Dr. Marshall W. NIRENBERG National Institutes of Healt Dept of Health, Education & Welfare BETHESDA 14 Maryland Many thanks for your two manuscripts. It is a wonderful story. All my congratulations. Sincerely yours, .* ( /!. ? \ 1.P ' i ': 7 L,,c' 'Lx -t i. ld \ 3 F. JACOB h