Ystorya Gwlat Ieuan Vendigeit (Llythyr y Preutur Sion)

A critical study of a Welsh translation of Ystorya Gwlat Ieuan Vendigeit, a letter supposedly sent by Prester John to Manuel, emperor of Constantinople about 1165, comprising presentations of two translations of the document, taken from manuscripts Jesus College 119, Peniarth 15, 47 and 267, an appreciation of the text and its significance in Welsh literature, and detailed notes.