A 56-page, hand written notebook once owned by Alan Turing is to go under the hammer at Bonhams' auction house. With entries dating back to Turing's Enigma Code breaking work at Bletchley Park in 1942 (which makes up the backbone of recent biopic The Imitation Game), it details "the foundations of mathematical notation and computer science”.
It's funny how the "lost" notebook becomes found again just as the Turing film is poised for Oscar glory, eh?
Aside from the book's significance in the history of computing, it also serves as a rare insight into Turing's personal life -- some of pages act as a dream journal. Given to Turing's colleague Robin Gandy by Turing himself, these personal reflections were likely the reason that the journal hasn't been sold off sooner, unlike many other letters and writings attributed to Turing.
The auction will take place at Bonhams' New York showroom on April 13th, and is expected to attract bids of "at least seven figures". [Bonhams]