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  Appendix 7 Washington (formerly Appendix G) - see HW 15/49 for message texts

  Appendix 7 Washington (formerly Appendix G) - see HW 15/49 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/15

• Catalogue level

  Division

  General records of the Government Code and Cypher School

  -c7">HW 7, HW 11; Histories of work at Bletchley Park HW 25, HW 43; Special Liaison Units histories

  Held by

  Date

  1914-1979

  Reference

• Catalogue level

  Piece

  German code book 13040, used inter alia for encoding Zimmerman message. Transferred...

  Transferred from HW 7/9 in August 1995

  Held by

  The National Archives, Kew

  Date

  1916-1917

  Reference

  HW 3/176

• Catalogue level

  Piece

  Associated press items and official announcements from Germany, US, Mexico and Japan....

  Transferred from HW 7/13 in August 1995

  Held by

  The National Archives, Kew

  Date

  1917 Mar

  Reference

  HW 3/180

• Catalogue level

  Piece

  Exchanges between Admiralty and British Naval Attaché Washington on events related...

  Transferred from HW 7/11 in August 1995

  Held by

  The National Archives, Kew

  Date

  1917 Feb-Mar

  Reference

  HW 3/178

• Catalogue level

  Piece

  Records of WF Clarke of Room 40 and Head of Naval Section, Government Code and Cypher...

  Transferred from HW 7/15 in August 1995

  Held by

  The National Archives, Kew

  Date

  1925-1927

  Reference

  HW 3/182

• Catalogue level

  Series

  Room 40 and successors: World War I Official Histories

  Official histories of the First World War from the viewpoint of the various signals intelligence organisations written by Senior Government Code and Cypher School members of staff. The series also includes some semi-official historical papers relatin…

  Held by

  The National Archives, Kew

  Date

  [c1910]-1923

  Reference

  HW 7

• Catalogue level

  Piece

  Room 40 German decrypts: diplomatic telegrams between Berlin and Mexico routed via...

  Room 40 German decrypts: diplomatic telegrams between Berlin and Mexico routed via Swedish diplomatic channels

  Held by

  The National Archives, Kew

  Date

  1916

  Reference

  HW 7/7

• Catalogue level

  Piece

  German Army and Navy monitor diplomatic communications and prove German Foreign Office...

  Transferred from HW 7/14 in August 1995

  Held by

  The National Archives, Kew

  Date

  1917 Mar-Aug

  Reference

  HW 3/181

• Catalogue level

  Piece

  US diplomatic telegrams between London and Washington related to Zimmerman message...

  Transferred from HW 7/12 in August 1995

  Held by

  The National Archives, Kew

  Date

  1917 Feb-Apr

  Reference

  HW 3/179

• Catalogue level

  Item

  Liaison between German Air Force and German Navy

  Liaison between German Air Force and German Navy

  Held by

  The National Archives, Kew

  Date

  [1938 Oct 21-1939 Jan 10]

  Reference

  HW 21/7/7

• Catalogue level

  Piece

  Germany 'Y' Organisation Listening Posts. Translation of a German manual. 'Scarlet...

  Germany 'Y' Organisation Listening Posts. Translation of a German manual. 'Scarlet Pimpernel' suggests that the document was acquired by the French

  Held by

  The National Archives, Kew

  Date

  1934 Jan 01 - 1935 Dec 31

  Reference

  HW 73/7

• Catalogue level

  Piece

  GC&CS Secret Service Sigint Volume II: Cryptographic Systems and their Solution....

  GC&CS Secret Service Sigint Volume II: Cryptographic Systems and their Solution. I Machine Cyphers. By J K Batey, M L Batey, M A Rock and P F G Twinn

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01 - 1945 Aug 30

  Reference

  HW 43/7

• Catalogue level

  Piece

  Selected folios from registry file including: GCHQ London signal detailing armed...

  Selected folios from registry file including: GCHQ London signal detailing armed revolt in Brunei and reaction of Sarawak political leaders; GCO(S) signal detailing rebel capture of radio facilities at Shell Seria Oilfield to appeal for help to Indon…

  Held by

  The National Archives, Kew

  Date

  1962 Dec 10 - 1963 Aug 22

  Reference

  HW 92/7

• Catalogue level

  Piece

  Reports in the series MK/1001 to MK/1500.

  Reports in the series MK/1001 to MK/1500.

  Held by

  The National Archives

  Date

  1941 Dec 18-1942 Jan 01

  Reference

  HW 20/7

• Catalogue level

  Piece

  Admiralty or War Cabinet intelligence papers: Austria's peace terms; general peace...

  Admiralty or War Cabinet intelligence papers: Austria's peace terms; general peace proposals; Italy; the Pope

  Held by

  The National Archives, Kew

  Date

  [c 1918]

  Reference

  HW 7/18

• Catalogue level

  Piece

  Reports on Japanese military activity and organisation in South East Asia and India

  Reports on Japanese military activity and organisation in South East Asia and India

  Held by

  The National Archives, Kew

  Date

  1944 Mar 17-1944 Nov 06

  Reference

  HW 46/7

• Catalogue level

  Piece

  Co-operation between allied signal intelligence authorities and the French

  Co-operation between allied signal intelligence authorities and the French

  Held by

  The National Archives, Kew

  Date

  1942 Jan 01 - 1945 Mar 31

  Reference

  HW 61/7

• Catalogue level

  Piece

  Security South Africa. 'Y' [Sigint] Board file reflecting security reservations about...

  Security South Africa. 'Y' [Sigint] Board file reflecting security reservations about Sigint relations with South Africa

  Held by

  The National Archives, Kew

  Date

  1943 May 27 - 1943 May 28

  Reference

  HW 69/7

• Catalogue level

  Piece

  Japanese communcations: messages and reports concerned with intercept, analysis and...

  Japanese communcations: messages and reports concerned with intercept, analysis and code breaking

  Held by

  The National Archives, Kew

  Date

  1944 Jan 01 - 1944 Mar 31

  Reference

  HW 67/7