The Modern Forgery Hypothesis

[eggyk]

As far as I can tell, it folds nicely into a pocket, similar to the first two examples although the wax would have been completely inside.

Apart from the folding, there is the problem that, AFAIK, the lining of the front cover was removed by Wilfrid and eventually replaced by a new blank sheet.  If so, any stains on the new lining will not be evidence that the letter was originally attached to the book.

(And besides I wonder if 400-year-old seal wax can still stain anything.)

All the best, --stolfi

If the letter was folded this way, theres no reason why it needs to match marks on the inside. It could have just been loose, right?

But the reason I mentioned this is to show that the letter could have been folded in a natural way that makes sense (and could explain the apparent ripping on the left side). The other issues are another matter.