The archive of papers included a signed copy of Turing’s 1939 PhD dissertation Systems Of Logic Based On Ordinals.

Cache of Turing’s work was almost shredded after being discovered in a house clearance in London last year

The archive of papers included a signed copy of Turing’s 1939 PhD dissertation Systems Of Logic Based On Ordinals.

'It's a once-in-a-lifetime discovery - not just for collectors, but for the sake of preserving the story of one of the greatest minds in history,' Jim Spencer, of Rare Books…