Folder marked "German codes: Goertz cipher (Held documents)" containing cryptographer's notes and document "Note on the Held cipher",

[undated].
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Bibliographic Details
Format: Manuscript
Language:English
Subjects:
Goertz, Hermann, > 1890-1947
Carroll-Held, Stephen, > 1896-1980
World War, 1939-1945 > Secret service > Germany
World War, 1939-1945 > Secret service > Ireland
World War, 1939-1945 > Cryptography
Ireland > Foreign relations > Germany
Germany > Foreign relations > Ireland > 1939-1945
Notes:In official envelope. Typescript and manuscript.

Physical description: 1 item (41 pages & 9 pages).

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Arrangement:Item
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Folder marked "German codes: Goertz cipher (Held documents)" containing cryptographer's notes and document "Note on the Held cipher",

[undated].
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Bibliographic Details
In Collection: Richard J. Hayes Papers, 1902-1976.
Language:English
Extent:1 item (41 pages & 9 pages).
Format:Manuscript
Call Number: MS 22,981/9 (Manuscripts Reading Room)
Rights:Reproduction rights owned by the National Library of Ireland.