4.
[k] Lib.1.cap.

4.] This prince was become so considerable in the Heptarchy, that the Emperor Charlemagne entered into an alliance and friendship with him; a circumstance which did honour to Offa, as distant princes at that time had usually little communication with each other.

That emperor being a great lover of learning and learned men, in an age very barren of that ornament, Offa, at his desire, sent him over Alcuin, a clergyman, much celebrated for his knowledge, who received great honours from Charlemagne, and even became his preceptor in the sciences.

The chief reason why he had at first desired the company of Alcuin, was, that he might oppose his learning to the heresy of Felix, Bishop of Urgel, in Catalonia, who maintained that Jesus Christ, considered in his human nature, could more properly be denominated the adoptive, than the natural son of God [m].

This heresy was condemned in the council of Francfort, held in 794, and consisting of 300 bishops.