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Hayes, Richard J., 1902-1976
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Hayes, Richard J., 1902-1976
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Hayes, Richard J., 1902-1976
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Photostat copies of codes and ciphers.
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Intercepted radio ciphers,
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Appendix C: Description of a code,
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Introductory,
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Intercepted radio ciphers, April and November 1943.
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Intercepted radio ciphers, July, October and November 1942, with attached note "Cdt. Butler to s...
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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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Intercepted radio ciphers, 5/2/1941 - 7/2/41.
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Richard J. Hayes Papers,
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Photostat copies of codes and ciphers.
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Note on the cipher used by the Irish Army,
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Intercepted radio ciphers, 12/2/1941 - 16/2/41.
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Browne and Nolan science exercise book containing ciphers.
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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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Photostat copies of ciphers.
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Envelope marked "Italian Legation Code", containing telegrams mainly from the Italian Embassies...
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World War, 1939-1945
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Hayes, Richard J., 1902-1976
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Burdick, Charles Burton, 1927-1998
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Germany. Botschaft (Ireland)
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Healy, Joseph G., Captain
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Richard J. Hayes Papers, 1902-1976.
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English
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1939-1945
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1890-1947
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Ireland
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Italy
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