At the time of the Conquest a quantity of legends and tales were current concerning the Celtic heroes of Britain, some of whom were quite independent of Arthur; nevertheless all ended by being grouped about him, for he was the natural centre of all this literature: "The Welsh have never ceased to rave about him up to our day," wrote the grave William of Malmesbury in the century after the Conquest; he was a true hero, and deserved something better than the "vain fancies of dreamers." William obviously was not under the spell of Arthurian legends.[178] Wales, Brittany, and Cornwall were the centres where these legends had developed; the Briton harpists had, by the beauty of their tales, and the sweetness of their music, early acquired a great reputation. It was a recommendation for a minstrel to be able to state that he was a Briton, and some usurped this title, as does Renard the fox, in the "Roman de Renart."[179] One thing, however, was lacking for a time to the complete success of the Arthurian epic: the stamp of authenticity, the Latin starting-point. An Anglo-Norman clerk furnished it, and bestowed upon this literature the Dares it needed. Professional historians were silent, or nearly so, respecting Arthur; Gildas, in the sixth century, never mentions him; Nennius, in the tenth, only devotes a few lines to him.[180] Geoffrey of Monmouth makes up for this deficiency.[181] His predecessors knew nothing, he knows everything; his British genealogies are precise, his narratives are detailed, his enumerations complete. The mist had lifted, and the series of these kings about whom so many charming legends were afloat now appeared as clear as the succession of the Roman emperors. In their turn they present themselves with the authority conferred at that time in the world by great Latin books. They ceased to be the unacknowledged children of anybody's fancy; they had to own them, not some stray minstrel, but a personage of importance, known to the king of the land, who was to become bishop of St. Asaph, and be a witness at the peace of 1153, between Stephen of Blois and the future Henry II. In 1139, the "Historia Regum Britanniae" had appeared, and copies began to circulate. Henry of Huntingdon, passing at the Abbey of Bec, in Normandy, in the month of January of that year, finds one, and is filled with astonishment. "Never," writes he to one of his friends, "had I been able to obtain any information, oral or written, on the kings from Brutus to Caesar.... But to my amazement I have just discovered--stupens inveni--a narrative of these times."[182] It was Geoffrey's book.