Foreword: A Historian's Perspective / David Kahn -- Axis Sigint Collaboration: A Limited Partnership / David Alvarez -- Automating American Cryptanalysis 1930-45: Marvelous Machines, a Bit Too Late / Colin Burke -- Signals Intelligence in Australia during the Pacific War / Frank Cain -- New Evidence on Breaking the Japanese Army Codes / Edward J. Drea and Joseph E. Richard -- The 'Usual Source': Signals Intelligence and Planning for the Eighth Army 'Crusader' Offensive, 1941 / John Ferris -- Cautious Coll aborators: The Struggle for Anglo-American Cryptanalytic Co-operation, 1940-43 / Lee A. Gladwin -- Searching for Security: The German Investigations into Enigma's Security / R. A. Ratcliff -- New Intelligence Releases: A British Side to the Story / Bradle y F. Smith -- Signals Intelligence and Vichy France, 1940-44: Intelligence in Defeat / Martin Thomas -- Chinese Codebreakers, 1927-45 / Maochun Yu.