Alan Turing: Enigma

"Oddest of all, in the heat of summer, he spent much of his time dressed as a private soldier allegedly drilling at Knightsbridge barracks, to what purpose nobody knew, but looking back on it now, I strongly suspect that drilling was not the object of the exercise at all. He was, as I have said, good at beating the system and, of course, the odder the things he did, the less one was likely to enquire into them..."

Alan Turing's brother, John, quoted in The Independent.
Codebreaker, an exhibition at the Science Museum celebrating Alan Turing in his centenary year, opens on Thursday June 21st.