[split] Jorge's Retracer Thread: darker ink, retracing of text and drawings

[Mauro]

The two forms coexisted for a long time during the 15th century so the modern one is not necessarily more recent. I don't see any difference in ink color or quill shape.

I didn't know that, was the style of numbers mostly a matter of personal preference in the XV century? Is it possible then, that the folio and quire numbers were created at the same time, just by different people?

Yes. Probably old people kept using the old forms that the youngsters were not taught anymore. I believed that the old forms became rare after 1450 but I was wrong: when I checked page numbers recently I found many. Probably also regional disparities in the time of adoption of the new forms.

This was a quite interesting piece of information to come to know. It does not completely removes the evidentiary evidence of @oshfdk's observation: if it's still more probable that numbers in the new notation where written late, even just a little, say 60% to 40%, or 3:2 odds, then it's still (weak) evidence.