This--mostly German--version of the Grail legend--has been used by Wolfram von Eschenbach for a long and famous epic, and by Wagner for his operas Parzival and Lohengrin. In the French and particularly in the English versions of the Quest for the Holy Grail, or Sangreal, Percival is with the other knights of Arthur's Round Table when they take this vow. He seeks for it, perceives it through a veil, but never entirely achieves the quest, since that privilege is reserved for the peerless Galahad. The versions of the Holy Grail Story of which Galahad is hero run about as follows: Galahad is the son of Launcelot and Elaine, the latter's nurse having, by means of enchantment, made her to appear as Guinevere--whom Launcelot loved. Deserted by the accidental father of her coming child, this Elaine--daughter of King Pelles--took refuge in a nunnery, where she gave birth to Galahad, whom when dying she entrusted to the nuns. Brought up by those holy women and strengthened in early infancy by frequent glimpses of the Holy Grail,--whose light was blinding to all but the perfectly pure,--Galahad reached manhood as pure as when he was born. One day Sir Launcelot and Sir Bors were summoned from Camelot to a small church near by, to act as sponsors for a young candidate for knighthood, who was presented to them by some nuns. Launcelot and Bors, having thus heard Galahad take his vows, were not surprised to see him brought into their midst on a gala day, by Merlin or by the spirit of Joseph, and to hear him warmly welcomed by Arthur. Some versions claim that Galahad, led to the Siege Perilous, found his name miraculously inscribed on it in letters of gold, and was told he alone should occupy that place at the Round Table. According to some accounts, it was while all the knights were thus seated around Arthur's board on this occasion, that the Holy Grail suddenly appeared in their midst, its radiance so veiled by its coverings that one and all vowed--when it had disappeared--never to rest until they had beheld it unveiled. Arthur, knowing this boon would be granted only to the absolutely pure and that they were all but one sinful men in various degrees, keenly regretted they should have made a vow which would entail a hopeless quest, and would at the same time leave him bereft of the very knights who had hitherto helped him to right the wrong and keep the pagans at bay. The knights hastened to church to receive a blessing before they departed, and then went off, singly or in small groups, to seek the Holy Grail.