The Book Switch Theory

[Jorge_Stolfi]

And as for the physical evidence of the letter having been attached to MS408: I am not conviced at all.  In fact, looking at the image of f0v at the Beinecke site, I would say that (1) the spacing of the marks is a bit different from the spacing of the seals on the letter, (2) the line connecting the marks has an incompatible position and tilt, (3) the paper lining we see now is not the one which was there when Wilfrid got the book, and (4) the "stains" do not look like stains but like holes on that paper sheet, like shaved-off air bubbles, that expose the tan material (vellum?) under it. 

Jorge , you did get an answer from me regarding some key things the Siloe facsimile can indicate

Indeed you did confirm (2).  And already a while ago. And no one protested...

All the best, --stolfi