The Book Switch Theory

[pjburkshire]

The diagram is specific in saying that the the animal skin parchment is what was dated. It does not convey any claim on the creation of the VMS itself. That was intentional. (Aside: I prefer the term "parchment" over "vellum", since the latter term refers to parchment of particular high quality; the VMS is not.)

I believe Koen did a study of art history and fashion history regarding the sleeves of the clothing in the illustrations in the Voynich Manuscript.  You may want to add that information to the carbon-dating information.  The window of clothing fashion is probably smaller than the window of a style of castle walls.