1924. This work is a dissertation submitted to the Catholic Sisters College of the Catholic University of America, in partial fulfillment of the requirements for the degree of Doctor of Philosophy. The purpose of this dissertation is to make as accurate and complete a study as possible of St. Augustine the orator, as displayed in his sermons ad populum. Never before has a thorough study been made of the rhetorical qualities of the sermons of this most renowned of all preachers of the early Latin church.