The revised version of The Quest of the Holy Grail gives a greater role to Perceval, and introduces a number of knights not found in the Vulgate; but the largest change is that much of the story of Tristan (and of his rivalPalamedes) is incorporated into the story. The achievement of the Grail quest centres on Galahad's healing of Pellehan, which has to be accomplished before the knights can reach the Grail itself. The Death of Arthur is little more...