Files W.F.F. Archive Correspondence, Memoranda, and Personnel File Records Photograph of Mark Rhoads and William Friedman, 1950 and Photocopy Excerpt of Armed Services Agency (ASA) Review on Mark Rhoads' Retirement, 1952. Mark Rhodes Was A First Lieutenant In the Signal Corps and Was the First Student of the Signal Intelligence School In 1931. He Became One of Friedman's Proteges, 1950-1952