Some suggestions and theories

[ololololo]

You can prove that it's from Northern Italy by comparing its style to books from there. I don't know of any refutations to this. If you do, let me know.

All we can conclude is that the Scribe who put the text to vellum had access to a bunch of books from North Italy and Central Europe.  

But he could be a boy from Madagascar who alone survived the shipwreck of an Arab merchant ship on a deserted island south of Borneo, and while waiting to be rescued found on the beach a large waterproofed trunk full of books and blank parchment that had belonged to John Dee but had accidentally fallen overboard when the good Doctor was crossing the Channel back home from Europe, and had been carried by sea currents down the Atlantic and across the Indian Ocean in a mere fifty years, which made it possible for the boy to kill time by creating a weird book full of bizarre drawings and reports of his erotic dreams in Malgasy but written in a simplified form of the Malayalam script, a book which he brought with him to Europe when he was finally rescued by Malaspina but lost it somewhere in Rome during a visit to Villa Torlonia.

We may never know.

All the best, --stolfi

This is the best theory at the moment!