Vita Merlini, or The Life of Merlin, is a Latin poem in 1,529 hexameter lines[1] written around the year 1150. Though doubts have in the past been raised about its authorship it is now widely believed to be by Geoffrey of Monmouth. It tells the story of Merlin's madness, his life as a wild man of the woods, and his prophecies and conversations with his sister, Ganieda, and the poet Taliesin. Its plot derives from previous Celtic legends of early Middle Welsh origin, traditions of the bard Myrddin Wyllt and the wild man Lailoken, and it includes an important early account of King Arthur's final journey to Avalon, but it also displays much pseudo-scientific learning drawn from earlier scholarly Latin authors. Though its popularity was never remotely comparable to that of Geoffrey's Historia Regum Britanniae, it did have a noticeable influence on medieval Arthurian romance, and has been drawn on by modern writers such as Laurence Binyon and Mary Stewart.