Number(?) in f36r

[oshfdk]

Also, I don't think it's possible for a non-expert in paleography to identify from the scans alone which layer of centuries old ink or paint is on top of which. Naively, one may think that if only part of a glyph is visible, the other part is hidden under the paint, however to me an equally plausible explanation is that the ink on top of a thick layer of paint had nothing to bind to and flaked off with time. As it could have happened in the notorious case of a green (?) speck of paint over a folio number. If we assume iron gall ink for the folio numbers, this type of ink binds to and reacts with the vellum. The part of ink that was on top of a grain of some mineral had nothing to react with, could have dried out and turned to dust, leaving an impression of paint added after the ink. I'm not saying it was one way or the other, but the possibility is there.