Beginning with a consideration of Malory's ingenious chronology, this study shows that Malory achieved thematic and structural unity by selecting from the great mass of Arthurian legend three narrative strands-the intrigues of Lancelot and Guinevere, the Grail quest, and the feud between the houses of Lot and Pellinore-using these to illustrate a single theme-the rise, flowering, and downfall of an ideal civilization. This selection and use of diverse...