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• Appendix 3 New York (formerly Appendix C) - see HW 15/48 for message texts

  Held by

  The National Archives, Kew

  Date

  1940-1948

  Reference

  HW 15/61/7

• General records of the Government Code and Cypher School

  Held by

  Date

  1914-1979

  Reference

• Government Code and Cypher School: Hut 3: Intelligence Reports on German Plans for...

  Held by

  The National Archives, Kew

  Date

  1940-1941

  Reference

  HW 48

• New York: "SMIT" reports on Lt. Col. William GAYLE and others.

  Held by

  The National Archives, Kew

  Date

  1943 Aug 23

  Reference

  HW 15/48/48

• Reports in the series QT/7501 to QT/7750.

  Held by

  The National Archives

  Date

  1942 Dec 01-1942 Dec 04

  Reference

  HW 20/48

• Cryptographic Security: TELEKRYPTON cypher machine and tape.

  Held by

  The National Archives, Kew

  Date

  1954 Mar-1954 June

  Reference

  HW 9/48

• GC&CS Army and Air Force Sigint Volume V: The Organisation and Evolution of British...

  Held by

  The National Archives, Kew

  Date

  1932 Jun 21 - 1945 Aug 30

  Reference

  HW 43/48

• Commercial reports

  Held by

  The National Archives, Kew

  Date

  1940 Sep 01-1940 Sep 08

  Reference

  HW 29/48

• Soviet Comintern messages: Service 9: Moscow to and from Poland. Moscow, callsigns...

  Held by

  The National Archives, Kew

  Date

  1943 Mar 17-1943 Nov 20

  Reference

  HW 17/48

• Reports of decrypts of Japanese military attachés messages

  Held by

  The National Archives, Kew

  Date

  1944 Jul 15-1944 Jul 24

  Reference

  HW 35/48

• Romanian Special Service of Information, Directorate of People's Security and Ministry...

  Held by

  The National Archives, Kew

  Date

  1950 Jun 26 - 1950 Dec 05

  Reference

  HW 75/48

• Decrypts of Japanese army and army air force messages

  Held by

  The National Archives, Kew

  Date

  1944 Aug 01-1945 May 31

  Reference

  HW 52/48

• PDH 3 - F Reports to SSA, War Department [Signal Security Agency, Arlington Hall,...

  Held by

  The National Archives, Kew

  Date

  1944 Mar 31 - 1944 Nov 13

  Reference

  HW 53/48

• Dossier. Middle East and North Africa and RAF Sigint Organisation. Notes made in...

  Held by

  The National Archives, Kew

  Date

  1936 Jan 17 - 1943 Dec 21

  Reference

  HW 50/48

• 52515-53688

  Held by

  The National Archives, Kew

  Date

  1943 Feb 15-1943 Feb 28

  Reference

  HW 19/48

• Battle Front West: German units and locations

  Held by

  The National Archives, Kew

  Date

  1944 Sept 2-1944 Nov 22

  Reference

  HW 13/48

• Weekly summary reports on Second World War German army and air force communications

  Held by

  The National Archives, Kew

  Date

  1945 Apr 01-1945 Apr 20

  Reference

  HW 45/48

• War (I) Programme Employment of sets

  Held by

  The National Archives, Kew

  Date

  1939 Apr 01-1940 Jul 25

  Reference

  HW 2/48

• Staff matters including recruiting, liaison with Oxford and Cambridge Universities;...

  Held by

  The National Archives, Kew

  Date

  1942 Aug 1-10

  Reference

  HW 14/48

• Visit to Estonia 1931. W/T [wireless telegraphy] log - DF [direction finding] station...

  Held by

  The National Archives, Kew

  Date

  1931 Aug 12 - 1931 Sep 17

  Reference

  HW 61/48