Secret Life of Bletchley Park - McKay Sinclair [149]
4 Memo from Frank Birch to Edward Travis, National Archives
5 Correspondence between Dr Dunlop and Commander Bradshaw, National Archives
6 Quoted in Paul Gannon, Colossus – Bletchley Park’s Greatest Secret (Atlantic, 2006)
11 1940: Enigma and the Blitz
1 Peter Calvocoressi, interviewed by the BBC
2 Aileen Clayton, The Enemy Is Listening (Hutchinson, 1980)
3 Clayton, The Enemy Is Listening
4 Captain Frederick Winterbotham, The Ultra Secret (Purnell Books, 1974)
5 R.A. Ratcliff, Delusions of Intelligence: Enigma, Ultra and the End of Secure Ciphers (Cambridge University Press, 2006)
6 Roy Jenkins, Churchill (Macmillan, 2001)
12 Bletchley and the Class Question
1 Josh Cooper’s account, National Archives
2 Recruitment documents, National Archives
3 Lord Dacre, interviewed by Graham Turner, Daily Telegraph, 2000
4 Quoted by Marion Hill, Bletchley Park People (The History Press, 2004)
5 Hairdressing facility memos, National Archives
13 1941: The Battle of the Atlantic
1 Joan Murray, quoted in Enigma: The Battle for the Code (Weidenfeld and Nicolson, 2000)
2 Jack Copeland (ed.), The Essential Turing: Seminal Writings in Computing, Logic, Philosophy (Clarendon Press, 2004)
3 Hugh Alexander, quoted in Enigma: The Battle for the Code
4 Asa Briggs, foreword to Gwen Watkins, Cracking the Luftwaffe Codes (Greenhill Books, 2006)
5 Memos concerning staffing, National Archives
6 Superintendent Blagrove, quoted in Marion Hill, Bletchley Park People (The History Press, 2004)
14 Food, Booze and Too Much Tea
1 Irene Young, Enigma Variations: A Memoir of Love and War (Mainstream, 1990)
2 Memos concerning Bletchley food, National Archives
3 Memos concerning tea consumption, National Archives
4 Memo from Captain Ridley concerning tea, National Archives
5 Memo from Denniston concerning tea, National Archives
15 1941: The Wrens and their Larks
1 Memo concerning Wren recruitment, National Archives
2 Documents donated by Felicity Ashbee to the Imperial War Museum
3 Documents held by Imperial War Museum
16 1941: Bletchley and Churchill
1 Gordon Welchman, The Hut Six Story (Allen Lane, 1982)
2 Quoted in Marion Hill, Bletchley Park People (The History Press, 2004)
3 Lecture to Sidney Sussex College given by John Herivel, 2005
4 Lecture to Sidney Sussex College given by John Herivel, 2005
5 Welchman, The Hut Six Story
17 Military or Civilian?
1 Peter Calvocoressi, Top Secret Ultra (Cassell, 1980)
2 Edward Thomas, essay in F.H. Hinsley and Alan Stripp, Codebreakers: The Inside Story of Bletchley Park (Oxford University Press, 1993)
3 R.A. Ratcliff, Delusions of Intelligence (Cambridge University Press, 2006)
18 1942: Grave Setbacks and Internal Strife
1 Kim Philby, My Silent War (MacGibbon and Kee, 1968)
2 F.H. Hinsley and Alan Stripp, Codebreakers: The Inside Story of Bletchley Park (Oxford University Press, 1993)
3 P.W. Filby, addressing an Enigma symposium, 1992
4 Robin Denniston, Thirty Secret Years (Polperro Heritage Press, 2005)
5 Denniston, Thirty Secret Years
6 Philby, My Silent War
7 Gordon Welchman, The Hut Six Story (Allen Lane, 1982)
8 Ralph Bennett, essay in Hinsley and Stripp, Codebreakers
9 Hugh Skillen, Enigma and its Achilles Heel (Pinner, 1992)
10 Hugh Denham, quoted in Michael Smith, The Emperor’s Codes (Bantam, 2000)
11 Michael Loewe, essay in Hinsley and Stripp, Codebreakers
12 Maurice Wiles, quoted in Smith, The Emperor’s Codes
13 Michael Loewe, essay in Hinsley and Stripp, Codebreakers
14 Hugh Denham, quoted in Smith, The Emperor’s Codes
15 John Winton, Ultra at Sea (Leo Cooper, 1985)
16 Edward Thomas, quoted in Hinsley and Stripp, Codebreakers
17 Aileen Clayton, The Enemy Is Listening (Hutchinson, 1980)
18 Ralph Bennett, essay in Hinsley and Stripp, Codebreakers
19 Memos about blocks, National Archives
20 Hugh Alexander, quoted in Enigma: The Battle for the Code
19 The Rules of Attraction
1 S. Gorley Putt, quoted in Margaret Drabble, Angus Wilson: The Biography (Secker and Warburg, 1995)
2 Jon Cohen, interviewed by the BBC
3 Wren interview, Bletchley Trust Archive,