... The lord of the magic castle, wherein are kept prisoners Arthur's mother and the other queens, is Clinschor, nephew of Virgilius of Naples, who took to magic after his unmanning at the hands of King Ibert, whose wife, Iblis, he loved.  Gawain overcomes the magician, and, both unknowing, fights with Parzival.  The latter, after many lesser adventures, meets his half-brother Feirefiz, and sustains with him the hardest of all his fights.  At length recognition is brought about, the two embrace, and repair to Arthur's court.  Cundrie nears once more, tells Parzival he has been chosen Grail king, that his wife and twin sons, Loherangrin and Kardeiz, have been summoned to the Grail castle, and that the question will now free Amfortas and his land.  With Cundrie and Feirefiz, Parzival rides to the Grail castle, meets his wife, together they all behold the talismans, save Feirefiz, to whom as a heathen the sight of the Grail is denied.  But he is baptised, weds Repanse de Schoie, the Grail damsel, the two return to India, and from them is born Prester John... (Studies on the Legend of the Holy Grail, Nutt, 1888)