Having obtained a first class degree in mathematics from Wadham College, Oxford, Walter Waddingham Shirley (1828 66) taught mathematics there before turning his attention to ecclesiastical history. Shirley earned a reputation amongst his contemporaries as an objective researcher with a clear writing style, and he was considered one of the ablest of the new Oxford historians. The Fasciculi, first published in 1858, is a collection of documents relating to John Wycliffe and his followers. The earliest texts reproduced in this volume are three partial determinations against Wycliffe dating from...