Wittgenstein notebooks rediscovered

Wittgenstein died 60 years ago today. The Guardian reports some rediscovered notebooks:

... the only known handwritten version of Wittgenstein's Brown Book – notes from his Cambridge lectures in the mid-1930s. There are an additional 60 pages of manuscript for the Brown Book with a revised opening and other changes.

Gibson also believes that a pinkish Norwegian school exercise book in the archive, which has a complete and previously unknown narrative, may in fact be a missing Wittgenstein gem – something talked about but never seen. "This may or may not be the missing item called the Pink Book or Yellow Book that scholars have long been hoping for." There is also a series of thousands of mathematical calculations in which Wittgenstein examines Fermat's little theorem.