Decree of Damasus, from the Acts of the Roman Synod, 382 A.D.

179 Now indeed we must treat of the divine Scriptures, what the universal Catholic Church accepts and what she ought to shun.

The order of the Old Testament begins here: Genesis one book, Exodus one book, Leviticus one book, Numbers one book, Deuteronomy one book, Josue Nave one book, Judges one book, Ruth one book, Kings four books, Paralipomenon two books, Psalms one book, Solomon three books, Proverbs one book, Ecclesiastes one book, Canticle of Canticles one book, likewise Wisdom one book, Ecclesiasticus one book.

Likewise the order of the Prophets. Isaias one book, Jeremias one book, with Ginoth, that is, with his lamentations, Ezechiel one book, Daniel one book, Osee one book, Micheas one book, Joel one book, Abdias one book, Jonas one book, Nahum one book, Habacuc one book, Sophonias one book, Aggeus one book, Zacharias one book, Malachias one book.

Likewise the order of the histories. Job one book, Tobias one book, Esdras two books, Esther one book, Judith one book, Machabees two books.

Likewise the order of the writings of the New and eternal Testament, which the holy and Catholic Church supports. Of the Gospels, according to Matthew one book, according to Mark one book, according to Luke one book, according to John one book.

The Epistles of Paul [the apostle] in number fourteen. To the Romans one, to the Corinthians two, to the Ephesians one, to the Thessalonians two, to the Galatians one, to the Philippians one, to the Colossians one, to Timothy two, to Titus one, to Philemon one, to the Hebrews one.

Likewise the Apocalypse of John, one book. And the Acts of the Apostles one book.

Likewise the canonical epistles in number seven. Of Peter the Apostle two epistles, of James the Apostle one epistle, of John the Apostle one epistle, of another John, the presbyter, two epistles (see note below), of Jude the Zealot, the Apostle one epistle.

The canon of the New Testament ends here.

Note in Denzinger: The Council of Carthage (15 years later) in 397A.D. attributes the three Epistles to the Apostle St John. See Denzinger #186.