Cof, cof...
Well, as no-one else has come in with anything, maybe I can jump in with something a little different?
I scanned this from a book I bought the other day, as it intrigued me. Catch (and the variation) is I don't
know what it is, but I have a very good idea, and obviously I've got an idea of the scope and date of the book.
No clues at this stage, but let's see how we go! I don't think we'll get a winner, because I'm looking for a consensus that it could be what I think it is, or that we all agree it's something else. Told you it'd be a bit different...