John B. Bannon excelled in four distinct capacities: as a pastor of a thriving Catholic congregation in St. Louis; as a chaplain with the First Missouri Confederate Infantry at Pea Ridge, Corinth, and Vicksburg; as a diplomat winning Irish support for the cause of the Confederacy; and as Ireland s greatest preacher in the 1880s.William Barnaby Faherty s latest book, "Exile in Erin: A Confederate Chaplain s Story," looks at new historical research and covers the entire life of this great man. It examines Bannon s boyhood in Ireland and his early years as a priest in St. Louis. Bannon gave up a...