Geoffrey of Monmouth and the Historia

Geoffrey of Monmouth's Historia regum Britanniae is the tradition's great watershed: everything before it is substratum, everything after it is response. Written around 1138 and dedicated (in most copies) to Robert, earl of Gloucester, it narrates two thousand years of British kingship from Brutus the Trojan to the seventh century — and at its center, occupying a fifth of the whole, stands Arthur: conceived at Tintagel by Uther through Merlin's art, crowned at fifteen, conqueror of the Saxons and then of half of Europe, betrayed at home by Mordred while marching on Rome, mortally wounded at Camlann, and carried to the Isle of Avalon "to be healed of his wounds." Geoffrey claims as his source "a certain very ancient book in the British tongue" given him by Walter, archdeacon of Oxford. No trace of it has ever been found, and the claim is best read as a genre convention — but notice that the tradition begins with an author gesturing at a book no one else can read.

What Geoffrey actually did was fuse: Gildas, Bede, and the Historia Brittonum for armature; Welsh genealogy and legend for texture; classical epic for shape; and his own formidable invention for everything else. His Merlin is itself a fusion — the fatherless boy Ambrosius from Nennius's tower story, spliced with the northern wild prophet you met in Unit 6 (a splice whose seam Unit 9 will examine). The result was a sensation. Some two hundred and twenty manuscripts survive; chroniclers absorbed it; kings deployed it. And the skeptics saw the problem at once — William of Newburgh's demolition is as old as the tradition itself. Read the Historia as its first readers could not: knowing both that it is false and that its falseness founded a matter more durable than most true things.