Via the Twitter feed of Incunabula:
Cheese meant female sheep & cows were usually more valuable than male ones which were accordingly slaughtered young as they were not worth feeding through the winter. The skins of these young animals was used to make vellum, giving us the basic material of the European book. 2/ pic.twitter.com/UbqYIJ5zoA
— Incunabula (@incunabula) September 6, 2021
