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. Such were the questions which were agitated in that age, and which employed the attention not only of cloistered scholars, but of the wisest and greatest princes [n]. [FN [l] Chron. Sax. p. 65 [m] Dupin, cent. 8. chap. 4. [n] Offa, in order to protect his country from Wales; drew a rampart or ditch of a hundred miles in length, from Basinwerke in Flintshire, to the south- sea near Bristol. See SPEED'S DESCRIPTION OF WALES.] Egfrith succeeded to his father Offa, but survived him only five months [o], when he made way for Kenulph, a descendant of the royal family. This prince waged war against Kent, and taking Egbert the king prisoner, he cut off his hands, and put out his eyes, leaving Cuthred, his own brother, in possession of the crown of that kingdom. Kenulph was killed in an insurrection of the East Anglians, whose crown his predecessor, Offa, had usurped. He left his son, Kenelm, a minor, who was murdered the same year by his sister, Quendrade, who had entertained the ambitious views of assuming the government [p]. But she was supplanted by her uncle Ceolulf; who, two years after, was dethroned by Beornulf. The reign of this usurper, who was not of the royal family, was short and unfortunate: he was defeated by the West Saxons, and killed by his own subjects, the East Angles [q]. Ludican, his successor, underwent the same fate [r]; and Wiglaff, who mounted this unstable throne, and found every thing in the utmost confusion, could not withstand the fortune of Egbert, who united all the Saxon kingdoms into one great monarchy. [FN [o] Ingulph. p. 6. [p] Ibid. p. 7. Brompton, p. 776 [q] Ingulph. p. 7. [r] Ann. Beverl. p. 87.]