Which things in the manuscript can be dated?

[-JKP-]

This is important because an expert has already said that John Dee did the foliation.

Which expert?

Andrew Watson, palaeographer.

There are many references to his statement available through Google Search. I think at some point years ago I also saw his exact? words quoted by someone. They're probably in my files, but I don't have time to look right now. He is mentioned frequently, however, at least since the time of Brumbaugh.