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• Accessions administration: HW 23

  Held by

  The National Archives, Kew

  Date

  1999 Jan 1 - 2003 Dec 31

  Reference

  PRO 57/15754

• See HW 15/25 1944 Aug 23

  Held by

  The National Archives, Kew

  Date

  1944 Dec 28

  Reference

  HW 15/27/85

• See HW 15/23, 1944 June 15

  Held by

  The National Archives, Kew

  Date

  1944 Aug 12

  Reference

  HW 15/25/24

• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: Naval Section: Reports of Japanese Naval Decrypts

  Held by

  The National Archives, Kew

  Date

  1940-1945

  Reference

  HW 23

• Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Jul 01-1943 Jul 07

  Reference

  HW 23/23

• Name: HW [Henry Wright] Shepherd. Date of Birth: [unspecified]. Age: [23]. Place...

  Held by

  The National Archives, Kew

  Date

  [1939-1945]

  Reference

  WO 416/327/24

• New York: Reference to the probable departure of "REST".

  Held by

  The National Archives, Kew

  Date

  1944 June 15

  Reference

  HW 15/23/23

• Naval Miscellaneous Papers 1941 Papers collected by Frank Birch detailing the operations...

  Held by

  The National Archives, Kew

  Date

  1941 Jan 01-1941 Dec 29

  Reference

  HW 8/23

• Minutes of VHF Sub-committee. The VHF Sub-committee was set up to coordinate investigations...

  Held by

  The National Archives, Kew

  Date

  1941 Aug 29-1942 Jan 03

  Reference

  HW 42/23

• GC&CS Naval Sigint Volume XIII: Technical Intelligence and the Processing of Captured...

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/23

• Papers by K, R, Division (Security) regarding GCHQ enquiry, 'Sigint post-mortem',...

  Held by

  The National Archives, Kew

  Date

  1982 July 12 - 1982 Oct 13

  Reference

  HW 92/23

• Decrypts of intercepted diplomatic communications. Argentina: 6829-6830. Brazil:...

  Held by

  The National Archives, Kew

  Date

  1921 June

  Reference

  HW 12/23

• Emergency - CROSSBOW. Emergency arrangement for accommodation in the event of a German...

  Held by

  The National Archives, Kew

  Date

  1943 Nov 09 - 1944 Aug 15

  Reference

  HW 53/23

• Staffing problems at BP; weekly status reports on resources for E intercept; weekly...

  Held by

  The National Archives, Kew

  Date

  1941 Nov 16-30

  Reference

  HW 14/23

• Chief of Intelligence Staff East Indies Station to Director of Naval Intelligence,...

  Held by

  The National Archives, Kew

  Date

  1945 Sept 7

  Reference

  HW 4/23

• Security implications of private correspondence

  Held by

  The National Archives, Kew

  Date

  1942 Feb 13 - 1946 Jan 24

  Reference

  HW 64/23

• Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Mar 30-1940 Mar 31

  Reference

  HW 29/23

• Including military situation reports from Eastern Front

  Held by

  The National Archives, Kew

  Date

  July 13 1941-July 21 1941

  Reference

  HW 5/23

• Vol X The German Navy - Surface and Air Forces by Lieutenant Commander L A Griffiths,...

  Held by

  The National Archives, Kew

  Date

  1939 - 1945

  Reference

  HW 11/23