A study of a contemporary witness to the transformation of post-Roman Britain into Anglo-Saxon England. Gildas's De excidio Britonum is a rare surviving contemporary source for the period which saw the beginning of the transformation of post-Roman Britain into Anglo-Saxon England. However, although the De excidio has received much scholarly attention over the last forty years, the value of the text as a primary source for this fascinating if obscure period of British history has been limited by our lack of knowledge concerning its historical and cultural context. In this new study the author challenges the assumption that the British Church was isolated from its Continental counterpart by Germanic settlement in Britain and seeks to establish a theological context for the De excidio within the framework of doctrinal controversy in the early Continental Church. The vexed question of the place of Pelagianism in the early British Church is re-investigated and a case is put forward for a radical new interpretation of Gildas's own theological stance. In addition, this study presents a detailed investigation of the literary structure of the De excidio and Gildas's use of verbal patterns, and argues that his use ofthe Bible as a literary model is at least as significant as his well-documented use of the literary techniques of Classical Latin. Dr KAREN GEORGE is currently a tutor at the Cambridge Institute of Continuing Education.