The Development of the Canon of the New Testament

The Canon of Cyril of Jerusalem

The chief surviving work of Cyril of Jerusalem (315-386 CE), his Catechetical Lectures, were instructions for catechumens as Lenten preparation prior to undergoing baptism on Holy Saturday. They were delivered mostly in the Church of the Holy Sepulchre, built by Constantine, and were published from shorthand notes taken down by a member of the congregation. The lectures contain a list of the books of both Old and New Testaments. It is noteworthy that the Revelation of John is not included; such is the state of things at Jerusalem by the middle of the 4th century.

From Cyril's Catechetical Lectures:

Then of the New Testament there are four Gospels only, for the rest have false titles and are harmful. The Manicheans also wrote a Gospel according to Thomas, which being smeared with the fragrance of the name 'Gospel' destroys the souls of those who are rather simple-minded. Receive also the Acts of the Twelve Apostles; and in addition to these the seven Catholic Epistles of James, Peter, John, and Jude; and as a seal upon them all, and the latest work of disciples, the fourteen Epistles of Paul.
But let all the rest be put aside in a secondary rank. And whatever books are not read in the churches, do not read these even by yourself, as you have already heard [me say concerning the Old Testament apocrypha]. (4.36)