"Sir Thomas Malory's Morte Darthur (1469) is one of the most renowned books in the world. Virtually all modern versions of the Arthurian legends are derived from its energetic, memorably phrased and remarkably individual telling of the stirring exploits of King Arthur and his Knights of the Round Table. Yet the identity of the fifteenth-century knight who wrote it has remained an enigma for centuries. The existing records of his life imply that he...