and senior codebreaker James Robertson, Blocks A and F, Air Section. Ran BP Recreational Club Choral Society (Director of the Sadler's Wells Opera Company) Alison Robins, Wren Margaret Rock, mathematician Jim Rose, Hut 3, later journalist and campaigner Pamela Rose, Hut 4 and Naval records, earlier actress, later school counsellor and charity chair Bob Roseveare, Hut 6 (schoolteacher) Miriam Louisa Rothschild, author and scientist Mair Russell-Jones, cryptanalyst in Hut 6, working on the Enigma cipher. John Saltmarsh (historian) D. R. Shackleton Bailey Anne Segrave (née Anne Hamilton-Grace; was indexer in Hut 3.in 1942,43, worked under F.L. Lucas, then Lavers; received a proposal of marriage from Ralph Tymms) Arthur Shaw (cryptographer); RN, at the Far East Combined Bureau, founder and head of diplomatic section. Edward H. Simpson, cryptanalyst and mathematical statistician Admiral Hugh Sinclair, non-operational Director of GC&CS (head of Secret Intelligence Service) Howard Smith (director general of MI5) Francis Hayward Stanton Rosemary Brown Stanton Oliver Strachey, head of the section deciphering Abwehr messages Alan Stripp, worked on Japanese codes (author of Codebreaker in the Far East) Sadie Stuart Joy Tamblin (Director of the Women's Royal Air Force) Derek Taunt, arrived in Bletchley Park in August 1941, worked in Hut 6 (mathematician, later bursar of Jesus College, Cambridge) Telford Taylor, US Army (Counsel for the Prosecution at the Nuremberg Trials) Ralph Tester, linguist, head of the Testery and member of a TICOM team (accountant with Unilever) John Thompson, codebreaker John Tiltman Edward Travis Michael Trumm Alan Turing, mathematician, logician, cryptanalyst, designer of the bombe, head of Hut 8 (pioneering computer scientist) W. T. Tutte Peter Twinn, first British cryptographer to read a German military Enigma message; became the head of the Abwehr Enigma section Ralph Tymms Jean Valentine, leading WRNS, Bombe operator Langdon Van Norden, US Army Signal Corps (chairman of the board of the Metropolitan Opera Association) Vernon Watkins Neil Leslie Webster, major in SIXTA, signals intelligence and codebreaking Peter Frederick West Maintained the Bombes at Bletchley Park. Gordon Welchman, initially in charge of Hut 6 with Jeffreys, became official head of the section until Autumn 1943; later Assistant Director of Mechanisation at Bletchley Park (author of The Hut Six Story, worked on secure communications systems for US forces) J. H. C. Whitehead, Newmanry mathematician (topologist, one of the founders of homotopy theory) Bernard Willson, academic, worked in Hut 4 on Italian and Japanese codes Angus Wilson (novelist and short