The Welsh were first. Arthur's court at Caerleon, Bran's cauldron at Harlech, a raid on Annwn for a pearled vessel, Peredur watching a spear and a severed head. There was no word Grail yet. Then France named it. Chrétien de Troyes, at Champagne, wrote graal for a serving dish in a wonder-procession. Robert de Boron, from the village of Boron, made that dish holy: the cup of the Last Supper, Joseph of Arimathea, the road west to the vaus d'Avaron.

Then the story came home. Glastonbury took Avalon. The White Book and the Red Book kept Peredur. Y Seint Greal brought the French holy quest back into Welsh. This chart follows that loop, manuscript by manuscript, and marks the later cups men pointed at. It does not make a relic into a twelfth-century fact.