This is the first book-length study of Peter of Cornwall, prior of Holy Trinity, Aldgate, London. His Liber Reuelationum (Lambeth Palace Library, MS 51), dated to the year 1200, is a compilation of over 1,100 chapters, excerpted from some 275 Latin texts, dealing with visions of the otherworld and revelatory appearances of God, Christ, Mary, angels, saints, devils, and revenants. Peter collected the material from saints' lives, chronicles, and free-standing vision texts from the first century AD through to his own day - for the purpose of providing evidence of the existence of God, the soul,...