Aitken, James Macrae
James Macrae Aitkin (1908-1983) was a Scottish player who won the Scottish chess championship 10 times (1935, 1952, 1953, 1955-1958, 1960, 1961, and 1965). He was also London champion in 1950. His highest rating was 2525. His PhD dissertation was on the Lisbon Inquisition. During World War II, he worked at Bletchley Park and was involved in cracking the German Enigma cypher machines.