Completion of the Canon.
The Christian canon, including the New Testament canon, assumed something like its present form under the labors of Augustine and Jerome toward the close of the fourth century. St. Augustine’s canon contained all of the books now contained in the Old and New Testaments, excepting Lamentations, which was excluded. It contained, in addition to these, the apocryphal pieces belonging to Daniel, and the books of Tobit, Judith, Wisdom, Ecclesiasticus, and First and Second Maccabees.
St. Jerome’s canon contained Lamentations, which Augustine’s canon excluded, and omitted Tobit, Judith, Wisdom, Ecclesiasticus, and First and Second Maccabees, which Augustine’s included. Roman Catholics accept the canon of Augustine, including Lamentations; Protestants, generally, accept the canon of Jerome.
While Jerome included in his canon all the books of the New Testament, he admitted that Philemon, Hebrews, Second Peter, Second and Third John, Jude, and Revelation were of doubtful authority.
Referring to the work of Augustine and Jerome, Davidson, says: “Both were unfitted for the critical examination of such a topic” (Canon, p. 200).