1 ‘I was approached’: History Sheet, 25 January, 1938, KV 2/1022.
2 ‘No official or other’: KV 4/227/1a.
3 ‘was too much’: Ibid.
4 ‘The work was’: History Sheet, 25 January, 1938, KV 2/1022.
5 ‘stitching reports into’: Macpherson, ‘Olga the Beautiful Spy’.
6 ‘most valuable information’: KV 4/227/1a.
7 ‘explained how the cipher’: Nigel West, Mask (London: Routledge, 2005), 21.
8 ‘an honest Communist’: Macpherson, ‘Olga the Beautiful Spy’.
9 ‘was a very nice man’: Masters, Man Who Was M, 35.
10 ‘had been sleeping’: Ted Crawford footnote in Harry Wicks, An Unpublished Chapter from Harry Wicks’s Autobiography, ed. Ted Crawford, http://www.cix.co.uk/~jplant/revhist/supplem/wicksind.htm.
11 ‘It is important to stress’: KV 4/227/1a.
12 ‘A clever woman’: Ibid.
13 ‘She’s Olga Pulloffski’: Written by Bert Lee and R. P. Weston. Lyrics accessed at http://lyricsplayground.com/alpha/songs/o/olgapulloffskithebeautifulspy.shtml on 10 September, 2012, and transcribed by Mark MacNamara in November 2003.
14 ‘Some “superior” people’: Knight, Taming and Handling Animals, 53.
15 ‘looking over your shoulder’: Valerie Lippay, telephone interview with author, May 2014.
16 ‘he was told’: Sean Rayment, ‘Traumatised MI5 Spy Fights Murder Verdict’, Sunday Times, 13 March, 2016.
17 ‘I informed the officer’: History Sheet, 25 January, 1938, KV 2/1022.
18 ‘As may be’: KV 4/227/1a.
19 ‘in an agent context’: Roberts to Harry, 10 February, 1969, Eric Roberts Papers.
20 ‘On instructions’: History Sheet, 25 January, 1938, KV 2/1022.