Geoffrey Mott-Smith was cochairman of the ACBL Laws Commission, editor of the ACBL Bridge Bulletin 1935–36, a contributor to The Bridge World, a writer, and a cryptographer. During World War II, Mott-Smith served as chief instructor for the OSS in the training of cryptographers and cryptanalysts. He wrote or cowrote more than 29 books on games and served as games consultant for the Association of American Playing Card Manufacturers.
