THE SCENE: Is King Arthur a figure of history or legend? The debate goes back all the way to the middle ages, where a 12th century historian has nothing but contempt for those who treat the subject as historical.
THE TEXT: For the purpose of washing out those stains from the character of the Britons, a writer in our times has started up and invented the most ridiculous fictions concerning them, and with unblushing effrontery, extols them far above the Macedonians and Romans. He is called Geoffrey, surnamed Arthur, from having given, in a Latin version, the fabulous exploits of Arthur, drawn from the traditional fictions of the Britons, with additions of his own, and endeavored to dignify them with the name of authentic history; moreover, he has unscrupulously promulgated the mendacious predictions of one Merlin, as if they were genuine prophecies, corroborated by indubitable truth, to which also he has himself considerably added during the process of translating them into Latin. He further declares that this Merlin was the issue of a demon and woman, and, as participating in his father’s nature, attributes to him the most exact and extensive knowledge of futurity; whereas, we are rightly taught, by reason and the holy scriptures, that devils, being excluded from the light of God, can never by meditation arrive at the cognizance of future events; though by the means of some types, more evident to them than to us, they may predict events to come rather by conjecture than by certain knowledge. Moreover, even in their conjectures, subtle though they be, they often deceive themselves as well as others. Nevertheless, they impose on the ignorant by their feigned divinations, and arrogate to themselves a prescience which, in truth, they do not possess. The fallacies of Merlin’s prophecies are, indeed, evident in circumstances which are known to have transpired in the kingdom of England after the death of Geoffrey himself, who translated these follies from the British language, to which, as is truly believed, he added much from his own invention.
Now, since it is evident that these facts are established with historical authenticity by the venerable Bede, it appears that whatever Geoffrey has written, subsequent to Vortigern, either of Arthur, or his successors, or predecessors, is a fiction, invented either by himself or by others, and promulgated either through an unchecked propensity to falsehood, or a desire to please the Britons, of whom vast numbers are said to be so stupid as to assert that Arthur is yet to come, and who cannot bear to hear of his death. Lastly, he makes Aurelius Ambrosius succeed to Vortigern (the Saxons whom he had sent for being conquered and expelled), and pretends that he governed all England superexcellently; he also mentions Utherpendragon, his brother, as his successor, whom, he pretends, reigned with equal power and glory, adding a vast deal from Merlin, out of his profuse addiction to lying. On the decease of Utherpendragon, he makes his son Arthur succeed to the kingdom of Britain — the fourth in succession from Vortigern, in like manner as our Bede places Ethelberht, the patron of Augustine, fourth from Hengist in the government of the Angles. Therefore, the reign of Arthur, and the arrival of Augustine in England, ought to coincide.
– History of English Affairs, William of Newburgh, 12th Century AD