John J Masterman

…clude North Africa and Italy, and he was made the deputy head of Section V under Major Felix Cowgill, an army officer seconded to SIS.[15] Cowgill was the SIS representative on the XX Committee run by John Masterman, which dealt with double agents working for the Abwehr but controlled by the...

Sir John Cecil Masterman (12 January 1891 6 June 1977) was a noted academic, sportsman and author. However, he was best known as chairman of the Twenty