Enigma machines used in the Spanish Civil War, one of the British participants in the conference in which the Poles disclosed to their French and British allies their achievements in Enigma decryption, broke the Abwehr non-steckered Enigma Solomon Kullback, American mathematician and cryptologist who visited Bletchley Park in May 1942 and cooperated with the British in the solution of more conventional German codebook-based systems. Shortly after his return to the US, Kullback moved into the Japanese section as its chief, and later joined the National Security Agency. Leslie Lambert (short story writer as A. J. Alan) Peter Laslett Hugh Last (Professor of Ancient History at Brasenose College, Oxford) F. L. ("Peter") Lucas, Hut 3 1939–45, translator and intelligence-analyst, acting head Hut 3, C.O. BP Home Guard (writer; lecturer in literature, King's College, Cambridge) Arnold Lynch Sir John Marriott (philatelist) Peter Marr-Johnston headed Wireless Experimental Centre, Delhi; British Army officer. Victor Masters, Testery shift-leader and senior codebreaker George McVittie OBE, Air Section, Head of Meteorological Sub-section. (Professor of Astronomy at the University of Illinois) Stewart Menzies, non-operational Director of GC&CS (head of Secret Intelligence Service) Donald Michie, joined BP in the early summer of 1942' later worked with Colossus; had the idea for modifying it to become Colossus II, which could tackle 'wheel patterns' in addition to 'wheel settings' Stuart Milner-Barry, member of Hut 6 from early 1940 to the end of the war; head of Hut 6 from Autumn 1943 (chess player and civil servant) Max Newman, head of the "Newmanry" (topologist) Brinley ("Bryn") Newton-John (father of Olivia Newton-John) Rolf Noskwith, cryptographer Wilfrid Noyce, wartime Intelligence Officer, cryptanalyst (climber, 1953 Mt Everest expedition; knew Alan Turing) Denis Oswald, linguist and senior codebreaker Thaddeus ("Teddy") Pilley, RAF Intelligence Officer, linguist in Hut 3 (was made Officier d’Academie by France; helped found the International Association of Conference Interpreters and the Institute of Linguists; founded and ran the Linguists' Club) John H. Plumb Howard Newton Porter, US Army (philologist, Yale classics instructor, professor of classics at Columbia University) Lewis Franklin Powell, Jr., US Army (member of the US Supreme Court) F.T. Prince (poet) Henry Reed, translator (poet and radio dramatist) David Rees, Hut 6 (mathematician) Marian Rejewski, Polish mathematician and cryptologist Grafton Melville Richards, ISOS, cryptographer, linguist and academic (Welsh and Celtic Studies). Author of Welsh language novel Y Gelyn Mewnol (The Enemy Within), (1943), Llandybie: Llyfrau'r Dryw. Jerry Roberts, Testery shift-leader, linguist