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• Italian Mission. Correspondence with Cypher Security Mission in Rome, charged with...

  Held by

  The National Archives, Kew

  Date

  1944 Jul 24 - 1945 Jun 11

  Reference

  HW 53/7

• DSH 10 - Near East codes and ciphers. Correspondence on acquisition and processing...

  Held by

  The National Archives, Kew

  Date

  1942 Feb 13 - 1944 Jun 19

  Reference

  HW 53/14

• Re-organisation of 'Y' Service (War), Sept 1939

  Held by

  The National Archives, Kew

  Date

  1939 Sep 01-1939 Sep 30

  Reference

  HW 2/53

• 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

• PDH 6 historical reports. Report on plans for the post-war organisation of the Diplomatic...

  Held by

  The National Archives, Kew

  Date

  1944 Oct 01 - 1944 Oct 11

  Reference

  HW 53/3

• Japanese naval decrypts

  Held by

  The National Archives, Kew

  Date

  1943 Dec 01-1943 Dec 04

  Reference

  HW 23/53

• 58649-59666

  Held by

  The National Archives, Kew

  Date

  1943 May 01-1943 May 15

  Reference

  HW 19/53

• Operational Orders sent from 4th Air Fleet to units in Romania outlining situation...

  Held by

  The National Archives, Kew

  Date

  1941 Sept 7

  Reference

  HW 1/53

• Soviet Comintern messages: ISCOT 1-100

  Held by

  The National Archives, Kew

  Date

  1944 Jan 21-1944 Apr 30

  Reference

  HW 17/53

• Cypher Mission in Germany. Arrangements for post-war supervision of German diplomatic...

  Held by

  The National Archives, Kew

  Date

  1944 Jun 21 - 1945 Aug 01

  Reference

  HW 53/55

• DD(C) - Deputy Director (Civil) - historical papers. Mostly planning for post-war

  Held by

  Creating government department or its successor

  Date

  1944 Oct 03 - 1946 Jan 15

  Reference

  HW 53/24

• Records Italian, January 1942 - June 1944. Correspondence about the decryption of...

  Held by

  The National Archives, Kew

  Date

  1942 Mar 25 - 1944 Jun 22

  Reference

  HW 53/45

• Canadian Liaison. Mainly correspondence between Denniston (Head of the Diplomatic...

  Held by

  The National Archives, Kew

  Date

  1943 Jan 08 - 1943 Dec 18

  Reference

  HW 53/40

• Matapan Dossier. Notes on the contribution of Sigint to the defeat of the Italian...

  Held by

  The National Archives, Kew

  Date

  1940 Sep 25 - 1945 Oct 31

  Reference

  HW 50/53

• Transport at Bletchley Park

  Held by

  The National Archives, Kew

  Date

  1944 Jan 03 - 1944 Oct 17

  Reference

  HW 64/53

• GC&CS Establishment Branch Records (Aldford House). Working accommodation of slipreaders...

  Held by

  The National Archives, Kew

  Date

  1945 Jun 18 - 1945 Oct 26

  Reference

  HW 53/52

• DSH 16 - Codes and Cyphers. Technical crypt matters

  Held by

  The National Archives, Kew

  Date

  1923 Jun 01 - 1945 Aug 31

  Reference

  HW 53/37

• Italian naval messages

  Held by

  The National Archives, Kew

  Date

  1940 Jun 13-1941 Jun 12

  Reference

  HW 18/53

• Canadian Liaison. Mainly correspondence between Denniston (Head of the Diplomatic...

  Held by

  The National Archives, Kew

  Date

  1944 Jan 05 - 1944 Jun 29

  Reference

  HW 53/41

• Liaison between Berkeley Street and Washington. Much of the correspondence is concerned...

  Held by

  The National Archives, Kew

  Date

  1943 Nov 17 - 1944 Sep 28

  Reference

  HW 53/49