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S., J. H.
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S., J. H.
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S., J. H.
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Herivelismus and the German military enigma : Warsaw, May 1928 to Bletchley Park, May 1940 /
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A: Three basic assumptions,
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Folder marked "Capt. Healy: Preetz document" containing letter from Captain Joseph G. Healy abou...
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Intercepted radio ciphers, July, October and November 1942, with attached note "Cdt. Butler to s...
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Intercepted radio ciphers, 17/2/1941 - 18/2/41.
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Intercepted radio ciphers,
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Combinations of m1 m2 m3.
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Intercepted radio ciphers, 15/2/1941-16/2/41.
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Copies of articles from various publications relating to codebreakding and photograph of cipher.
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Intercepted radio ciphers,
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Sheets of ciphers and attempts at code-breaking,
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Photostat copies of codes and ciphers.
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Official envelope, marked "B10" (changed to "8"), containing notes on cipher,
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Description by Richard J. Hayes of cipher message burnt by Hermann Goertz in the grate of his ce...
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Copy of letter concerning ciphers based on the letters AEIOU,
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Envelope marked "Current Donnybrook code" containing codebreaker's notes,
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Intercepted radio ciphers,
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Intercepted radio ciphers, April and November 1943.
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Appendix C: Description of a code,
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Intercepted radio ciphers, 5/2/1941 - 7/2/41.
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Subject: Cryptography
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Cryptography
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Secret service
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World War, 1939-1945
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Hayes, Richard J., 1902-1976
1
Burdick, Charles Burton, 1927-1998
1
Germany. Botschaft (Ireland)
1
Healy, Joseph G., Captain
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Herivel, John
Collections
40
Richard J. Hayes Papers, 1902-1976.
Language
41
English
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Personal narratives, British
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39
1939-1945
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1890-1947
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Ireland
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Germany
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Bletchley Park (Milton Keynes, England)
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Great Britain
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Italy
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