To be fair, it was the contextualization and modern adaptation which really made it plagiarizable. If you haven't already run across discussions of it, they're worth reading for a professional editor who claims that everything on the internet is public domain, amongst other assertions.
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In other news, I must have gone to the Ton too soon for there to have been anyone else there.
I also made it to the British Library to look at really cute tiny little seventeenth-century books, barely bigger than a credit card, and the British Museum to look at absolutely gigantic sixteenth-century prints, so big that I had to take up several peoples' worth of desk space to see them.