One man’s mission to uncover a WWII decryption machine

Randell’s curiosity was piqued by a biography of Alan Turing, written by his mother, Ethel Sara Turing. In particular, one paragraph caught his eye, describing how she knew nothing of her son’s involvement in the war. Turing had “disappeared” to Bletchley Park, leaving no clue as to what he was doing. This told Randell there was something left to uncover at Bletchley.