William Perkins and William Bishop, two of the leading spokesmen for their respective religious traditions in late sixteenth- and early seventeenth-century England, clashed in print over the status of the Blessed Virgin Mary, as well as a number of other issues. They were formidable adversaries. Perkins, the most widely-read English Protestant theologian of the day, helped to make Cambridge University a centre of Reformed thought and practice. Bishop, an Oxford-trained theologian with extensive experience and associations on the continent, eventually became the first Roman Catholic bishop in England since the death of the last surviving bishop of Mary I’s reign. Though discussions of the Virgin Mary were not major themes in the books of either writer, their views on this subject are significant in showing how the two traditions developed, in competition with each other, during this phase of the long English Reformation.