Description: (SCIENTISTS.) CRICK, FRANCIS; AND JAMES DEWEY WATSON. Crick. Typed Letter Signed * Watson. Photograph Signed, "J.D. Watson." Crick's letter, to László Magyar, declining to send a photograph and stating that, "At the moment I am working on the structure of chromatin and positional information in embryology." 1 page, oblong 8vo, "Medical Research Council" stationery; vertical fold. Watson's photograph, half-length portrait by Watson showing him with papers in hand and chalk board in background. Signed in the image, lower right. 7x5 inches. - Cambridge, England, 31 July 1974