Focus on
Olga Gray and the Woolwich Arsenal Spy Ring
In 1938, thanks to years of work by a remarkable female agent, MI5 ensured a package of British defence plans stayed secret.
Piece
GC&CS Naval Cryptanalytic Studies Volume XI: Japanese Early High-Grade Cyphers and...
Catalogue reference: HW 43/36
What’s it about?
This record is about the GC&CS Naval Cryptanalytic Studies Volume XI: Japanese Early High-Grade Cyphers and... dating from 1939 Sep 01 - 1945 Aug 30 in the series Government Code and Cypher School: Histories of British Sigint. It is held at Creating government department or its successor.
Is it available online?
Maybe, but not on The National Archives website. This record is held at Creating government department or its successor.
Can I see it in person?
Not at The National Archives, but you may be able to view it in person at Creating government department or its successor.
Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
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HW 43/36
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Date (When the record was created)
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1939 Sep 01 - 1945 Aug 30
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Description (What the record is about)
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GC&CS Naval Cryptanalytic Studies Volume XI: Japanese Early High-Grade Cyphers and Minor Additive Cyphers by C H O'D Alexander, L S Brown, J W S Cassels, J E T English, H R Foss, H L John, J T Martin, J M G Pollard, B E Russell, L E S Taylor, H A Thurtsonand G C Wall
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Held by (Who holds the record)
- Creating government department or its successor
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Legal status (A note as to whether the record being described is a Public Record or not)
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Public Record(s)
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Closure status (Whether the record is ‘open’ (available to the public) or ‘closed’ (not available due to a legal exemption))
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Closed Or Retained Document, Open Description
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Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
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- Topics
- Intelligence
- Navy
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C11177343/
How to order it
- View this record page in our current catalogue
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Series information
HW 43
Government Code and Cypher School: Histories of British Sigint
See the series level description for more information about this record.
Catalogue hierarchy
Over 27 million records
This record is held at Creating government department or its successor
17,110 records
Within the department: HW
Records created or inherited by Government Communications Headquarters (GCHQ)
96 records
Within the series: HW 43
Government Code and Cypher School: Histories of British Sigint
You are currently looking at the piece: HW 43/36
GC&CS Naval Cryptanalytic Studies Volume XI: Japanese Early High-Grade Cyphers and...
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