A source book of theological and historical passages from the Christian writings of the Post Nicene and Constantinopolitan eras throught St. Jerome. The passages selected are keyed to the numerical order established in M.J. Rouet de Journel's Enchiridion Patristicum. In no sense, however, are these volumes a translation of that standard work. The author has made his own investigation of theological textbooks in common use and has selected the patristic passages most frequently cited, including much that is in Rouet and much that is not. All passages have been freshly and accurately translated from the best critical editions.