RAF BLETCHLEY PARK SIGNED SIR HARRY HINSLEY ENIGMA & THE ULTRA SECRET CODE RARE

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RAF BLETCHLEY PARK SIGNED SIR HARRY HINSLEY ENIGMA & THE ULTRA SECRET CODE RARE 16 Dec 94 BFPS 2438 50th Anniversary Battle of the Ardennes Special Postmark German Offensive in the Ardennes 16 December 1944. Enigma and the Ultra Secret . Flown Hercules Personally Signed by Professor Sir Harry Hinsley OBE MA FBA. Sir Francis Harry Hinsley OBE (26 November 1918 – 16 February 1998) was an English historian and cryptanalyst. He worked at Bletchley Park during the Second World War and wrote widely on the history of international relations and British Intelligence during the Second World War. He was known as Harry Hinsley. Early life Hinsley was the son of a miner and was educated at Queen Mary's Grammar School, Walsall, and in 1937 won a scholarship to study history at St. John's College, Cambridge. In October 1939, while still studying at St. John's, he was summoned to an interview with Alastair Denniston, head of the Government Code and Cypher School (GC&CS), and was thereby recruited to Bletchley Park's naval section in Hut 4. Bletchley Park At Bletchley Park, Hinsley studied the external characteristics of intercepted German messages, a process sometimes termed "traffic analysis": from call signs, frequencies, times of interception and so forth, he was able to deduce a great deal of information about the structure of the German read more

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