This is the first study for more than seventy years to consider the early monasteries of Cornwall through a combination of evidence -written sources (the first hagiography of Brittany and Cornwall, ecclesiastical documents, Anglo-Saxon charters, Domesday Book), place-names and material remains. The main emphasis is on identifying the sites of these monasteries, and tracing their survival to later periods; Dr Olson also considers the origin and progress of monasticism in south-west Britain, and looks at the monasteries' characteristics and, in a broader context, their place in Church and society.