1. The most widely known English-language revelation was, of course, F. W. Winterbotham, The Ultra Secret, (New York: Harper and Row, 1974), which remains a useful overview and is especially useful on the methods of sending Ultra to the field and protecting it - but also contains a number of the errors natural in a book based almost entirely on personal recollection. Actually, the breaking of the Abwehr Enigma, and also of strategic Enigma messages, was disclosed in 1973 in an unlikely source, the second volume of the memoirs of the distinguished journalist Malcolm Muggeridge. Chronicles of Wasted Time: Chronicle 2: The Infernal Grove, (New York: William Morrow, 1974, and London: Collins, 1973, pp. 127, 129, 150-151, 187 189, 201, 204). And the footnotes to the present Hinsley volume (p. 489) now disclose at least to me, that a Polish author had written briefly in Polish of the success against Enigma as early as 1967.

The five later works mentioned are: R. V. Jones, The Wizard War: British Scientific Intelligence. 1939 45, (New York: Coward, McCann and Geoghegan, 1978); Patrick Beesly, Very Special Intelligence, (Garden City, New York: Doubleday, 1978); Ronald Lewin, Ultra Goes to War, (New York: McGraw-Bill, 1978); Anthony Cave-Brown, Bodyguard of Lies, (New York: Harper and Row, 1975); William Stevenson, A Man Called Intrepid: The Secret War, (New York: Harcourt, Brace and Jovanovich, 1976). The hero of the last of these, Sir William Stephenson, was indeed a distinguished...