The Modern Forgery Hypothesis

[Jorge_Stolfi]

So if it is that easy and explainable as to how two items could become separated within two months of being within a single home

Indeed I would think that, when Kircher received the book (A or B, or whatever) from Marci, he filed the letter together with all other letters, and put the book on a shelf among with all his other books.   Leaving letters attached to books and other physical objects he received would have been an extremely disorganized way to manage his collection.  No?

All the best, --stolfi