Alan Turing's notebook goes to auction
A handwritten notebook by wartime code-breaking genius Alan Turing is going on the auction block in New York today, where it is expected to bring at least one million dollars (€943,000).
Bonhams says the 56-page manuscript is believed to be the only extensive Turing manuscript known to exist.
The notebook was written at the time the mathematician and computer science pioneer was working to break the seemingly unbreakable Enigma codes used by the Germans throughout the Second World War.
It contains Turing's complex mathematical and computer science notations.
The story of how Turing and his team of cryptanalysts broke the code was portrayed in the film The Imitation Game, starring Benedict Cumberbatch.