Malory interprets existing French and English stories about these figures and adds original material (e.g., the Gareth story). Le Morte d'Arthur was first published in 1485 by William Caxton, and is today one of the best-known works of Arthurian literature in English. Many modern Arthurian writers have used Malory as their principal source, including T. H. White in his popular The Once and Future King and Tennyson in The Idylls of the King.