About the binding(s?) and missing folios

[ReneZ]

I have a bit of a suspicion that a sample of each illustration type was removed by someone, perhaps in order to send to someone else to analyse, but there is no way to be certain about that.

It is also possible that some pages were in such a bad shape that they were removed during a rebinding. Also unprovable. This would not be the case for folios 12 and 74, which were clearly cut out.