The auction house Bonhams in New York have just sold a handwritten scientific document written by Alan Turing, in which he worked on the foundations of mathematical notation and computer science, for $1,025,000. Before the auction Bonhams described the document as "Made up of 56 pages contained in a simple notebook bought from a stationers in Cambridge, UK, it is almost certainly the only extensive autograph manuscript by Turing in existence, and has never been seen in public. From internal evidence, it dates from 1942 when he was working at Bletchley Park to break the German Enigma Code, and provides remarkable insight into the thought process of a genius."
from The Universal Machine http://universal-machine.blogspot.com/
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