Official envelope, marked "D10", containing notes on cipher,

[undated].
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Bibliographic Details
Main Creator: Hayes, Richard J., 1902-1976
Format: Manuscript
Language:English
Subjects:
World War, 1939-1945 > Secret service > Germany
World War, 1939-1945 > Secret service > Ireland
World War, 1939-1945 > Cryptography
Cryptographers > Ireland
Ireland > Foreign relations > Germany
Germany > Foreign relations > Ireland > 1939-1945
Notes:Physical description: 1 item (13 pages).
Arrangement:Item
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Official envelope, marked "D10", containing notes on cipher,

[undated].
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Bibliographic Details
In Collection: Richard J. Hayes Papers, 1902-1976.
Main Creator: Hayes, Richard J., 1902-1976
Language:English
Extent:1 item (13 pages).
Format:Manuscript
Call Number: MS 22,983/16 (Manuscripts Reading Room)
Rights:Reproduction rights owned by the National Library of Ireland.