Files W.F.F. Archive Reports and Research Notes Memoranda, Correspondence, and Research Notes on A Request for Japanese Target Intelligence Committee (TICOM) Data, the Army Security Agency's Results of Axis Analysis of United States Communications AS Revealed by TICOM and Other Sources of Intelligence-Volume C German Traffic Analysis of United States Communications (16 August 1946), an Extract from History of H.M.S. Anderson Investigation of National War Effort, Investigations of the National War Effort Report Committee on Military Affairs House of Representatives (1946), 1946-1955
Extract from "History Of H.M.S. Anderson"
Friedman Letter to British Joint Services Mission, Washington Re Japanese Diplomatic Section History by GCHQ
Handwritten Note Alluding to Purple Machine and "Peterson Trial"
Handwritten Note Re the British and A Purple Machine
Investigation of the National War Effort; Report of the Committee on Military Affairs, House of Representatives, 79th Congress, Second Session
Japanese Version of the Black Chamber; TICOM Document
Letter from British Joint Services Mission, Washington to Friedman Enclosing Japanese Diplomatic Section History by GCHQ
Letter from Friedman to SUKLO Re GCHQ Document
Letter to Friedman from British Joint Services Mission, Washington Re Japanese History from GCHQ
Liaison with America; Extract from GCHQ History of Japanese Diplomatic Purple Machine
Request for Japanese TICOM Data-Friedman Memo