This author wrote the most widely spread account of how the devil's head lies in a "valley perilous" in India.
This author described a prophecy in which a mass is held under a Dry Tree by Jerusalem, which will convert many Saracens and Jews to Christianity. Henry Yule's entries in the Encyclopedia Britannica drew attention to this author as a fraud who probably originally composed in French, rather than English. This author wrote the most widely spread account of how the devil's head lies in a "valley perilous" in India. The opening of this author's work draws on accounts of William of Boldensele and aims to provide a guide for (*) pilgrims and Crusaders. The vast majority of his major work was clearly ripped off without credit from other sources, particularly the accounts of a monk named Hetoum and Friar Odoric, who each wrote descriptions of Prester John and Asia. For 10 points, name this purported author of a late 14th-century bestselling travelogue.
This author described a prophecy in which a mass is held under a Dry Tree by Jerusalem, which will convert many Saracens and Jews to Christianity.
Jean Mandeville [or John Mandeville; prompt on Jean or John or Johannes or whatever]