Chapter 1
i. Hugh Cleland Hoy, 40 OB, or How the War Was Won
ii. The meaning of ‘asches’ has not been identified, and the nearest guess is that it refers to Asdic, the antisubmarine sonar device that was a major Allied secret weapon. Bulky and complex, it would have been necessary to destroy the device physically in situ to prevent it falling into enemy hands.
Chapter 2
i. Mrs FE Clark
ii. Jean Thompson, WRNS
Chapter 3
i. RJ Drury
Chapter 4
i. Adolf Hitler
ii. Peter Twinn, Bletchley Park
Chapter 5
i. FW Winterbotham (The Ultra Secret, Futura, 1975)
Chapter 6
i. Dwight Eisenhower
ii. Erik Hazelhoff
Chapter 7
i. Anonymous American officer
Chapter 8
i. FW Winterbotham: The Ultra Secret