The central part of this thesis consists of an edited text of the 1548/50 edition of Wicklieffes Wicket printed in London by John Day. The absence of a critical edition of this text has prevented historians from adequately assessing its significance either in its Wycliffite or its Reformation context. The Wicket itself deals primarily with eucharistic theology, and as secondary themes with ecclesiology, Christology, vernacular scriptures and the problems of religious language. It is suggested that the origins of the Wicket can be ascribed to no later than the last quarter of the Fifteenth Century, and its theology to Lollardy. In the Sixteenth Century the Wicket appeared with the Testament of William Tracy, a notably Protestant document dat...