article_snippet.sent: It is believed to be the only extensive Turing manuscript known to exist, the auctioneer said.
article_snippet.sent: the notes at the Bletchley Park code-breaking headquarters are believed to be the only extensive Turing manuscript (right) known to exist, the auctioneer said .
highlights_snippet.sent: Only extensive Turing manuscript thought to exist, the auctioneer said .
  
highlights_snippet.sent: Only extensive Turing manuscript will be sold by an anonymous seller by Bonhams in New York on Monday .