[The author argues for the use of hagiographical texts to expand the evidence for the theological tradition, precisely during the early Middle Ages when more obvious sources are wanting. Her thesis is that there is sound basis for reading the lives of the saints through the lens of doctrinal theology. After giving this evidence, she then exemplifies the value of such a reading by an ecclesiological analysis of Rudolf of Saxony’s life of St. Leoba, a companion of St. Boniface.]