Code-breaker's notes to auction for $1m
A handwritten notebook by Alan Turing, the World War II code-breaking genius depicted by Benedict Cumberbatch in the Oscar-nominated The Imitation Game, is going on the auction block.
It is being sold by Bonhams in New York on April 13 and is expected to bring at least $1 million.
The 56-page manuscript was written at the time the British mathematician and computer science pioneer was working to break the seemingly unbreakable Enigma codes used by the Germans throughout World War II.
The notebook contains Turing's complex mathematical and computer science notations. It is believed to be the only extensive Turing manuscript known to exist, the auctioneer said.
It dates from 1942, when Turing was trying to break the seemingly unbreakable code with his team of cryptanalysts at Britain's World War II code and cypher school Bletchley Park.
The notebook was among the papers he left in his will to friend and fellow mathematician Robin Gandy.
Gandy gave the papers to The Archive Centre at King's College in Cambridge in 1977. But he kept the notebook, using its blank pages for writing down his dreams at the request of his psychiatrist.