I find it very hard to believe in all of these recent finds, which all follow the same pattern "some englishmen claim they have found a huge intact encrypted text from a famous author, while never leaving a major library".
I wonder if any of these finds were held to the same level of scrutiny as the recent Korean superconductor candidate.
They were adjacent to other letters from embassies and the royal court. I don’t think attribution would be too onerous.