Incidentally, in the Middle Ages vellum was made from calfskin, and parchment was made from sheepskin. I even included a mildly amusing exchange about this in Enoch’s Device when Ciarán and Dónall are with the eunuch Talid in the Great Library of Córdoba:
“I don’t smell any vellum,” Ciarán observed, noticing only the fragrance of sandalwood.
“Of course not. We use paper.”
“I suppose they don’t have it in your infidel homeland,” Talid said. “It’s made from wood instead of calfskin. It’s cleaner and far smoother to write on. And it makes our calves much happier than in your part of the world.”
Hope you enjoy the videos, and let me know if you have a favorite clip from the folks at Horrible Histories!