Augustine undertakes the refutation of the arguments which might be derived from the Epistle of Cyprian to Jubaianus, to give colour to the view that the baptism of Christ could not be conferred by heretics, 54 BOOK IV. In which he treats of what follows in the same Epistle of Cyprian to Jubaianus, 79 BOOK V. He examines the last part of the Epistle of Cyprian to Jubaianus, together with his Epistle to Quintus, the letter of the African Synod to the Numidian bishops, and Cyprian's Epistle to Pompeius, 115 BOOK VI. In which is considered the Council of Carthage, held under the authority and presidency of Cyprian, to determine the question of the baptism of heretics, 150 BOOK VII. In which the remaining judgments of the Council of Carthage are examined, 195 ANSWER TO LETTERS OF PETILIAN. BOOK I. Written in the form of a letter addressed to the Catholics, in which the first portion of the letter which Petilian had written to his adherents is examined and refuted, 231 BOOK II. In which Augustine replies to all the several statements in the letter of Petilianus, as though disputing with an adversary face to face, 255 BOOK III. In this Book Augustine refutes the second letter which Petilianus wrote to him after having seen the first of Augustine's earlier Books. This letter had been full of violent language; and Augustine rather shows that the arguments of Petilianus had been deficient and irrelevant, than brings forward arguments in support of his own statements, 405 ON THE CORRECTION OF THE DONATISTS. A Letter of Augustine to Boniface, who, as we learn from Epistle 220, was Tribune, and afterwards Count in Africa. In it Augustine shows that the heresy of the Donatists has nothing in common with that of Arius; and points out the moderation with which it was possible to recall the heretics to the communion of the Church through awe of the imperial laws. He adds remarks concerning the savage conduct of the Donatists and Circumcelliones, concluding with a discussion of the unpardonable nature of the sin against the Holy Ghost, 479 INDEX. 521 PREFACE.