I don’t believe it would have ever been lost had it unambiguously proven their case.
It was lost on purpose because it would destroy their case.
Old historic documents...mostly lists of temperatures, pressure, rainfall...many hand written....a few signed by famous people like Shackelton, Amundsen, Darwin, Cook.
Makes neat wall paper for the den...great conversation peice...own a page of history...1c each...lots of 1000 at $49.99c