George Lyttelton (1767). The History Of The Life of King Henry the Second, Sandby and Dodsley. pp. 153–.
The sons of villeins ought not to be ordained without the consent of
their lords, in whose lands they are known to have been born.
The reason of this was, that the ordaining of a slave had the effect of
an enfranchisement, and therefore, the sons of villeins being born in
slavery, it was robbing their lord, to set them free in this manner, without