Alan Turing's Enigma Treatise online

uzada writes "Bruce Schneier's CRYPTOGRAM mailing list had a link off to three chapters of Alan Turing's treatise on the Enigma, retyped from the only known paper copy. It may be a chance to see if Neal Stephenson knew what he was talking about in _Cryptonomicon_... " It's only three chapters, but I'm looking forward to reading it, as Turing has been referenced in almost every CS class I've taken.