Solving the Enigma

26. Winton, John, Ultra at Sea (New York: William Morrow and Co. Inc., 1988), 146.

27. Helgason, Gudmunder, editor, U-boat Fates: The Guide to all U-boat Losses, http://www.uboat.net/fates/may43.htm 1999.

28. Erskine, Ralph, "Naval Enigma: The Breaking of Heimisch and Triton," Intelligence and National Security, v.3 n.l (January 1988), 171-172.

29. Conversation between Veronica Mackey Hulick and the author, March 28, 2000.

30. Dalton, Curt, Keeping the Secret, 22.

31. For an explanation of cribs, menus, and Bombe set-up, see Appendix I.

32. Conversation between Phil Bochicchio and the author, March 20, 2000.

33. Ibid.

34. Battle of the Atlantic: Vol. II U-boat Operations, National Security Agency SRH-008, 1945, 127.

35. Bombe History, 6-7.

36. Conversation between Phil Bochicchio and the author, March 20, 2000.

37. Ibid.

38. Correspondence to the author from Sue (Sadie) Unger Eskey, December 20,1999.

39. Conversation between Phil Bochicchio and the author, November 26,1999.

40. M-7, M-8, M-9 Devices and CSP-890 (A) "The Standard #530 Bombe," (NARA Record Group 457, File #1738.)

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