THEOPHILUS. Apologist of Antioch. Ad Autolycum c. A.D. 180

IRENAEUS. Bishop of Lyons. Against Heresies c. A.D. 185

[1] In the case of most of these witnesses the date here given is that of their chief literary activity.

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CLEMENT OF ALEXANDRIA. Head of the Catechetical
School. Paedagogus, Hypotyposes, etc. . . . . c. A.D. 190

TERTULLIAN. Of Carthage. Apologist . . . . . . . . A.D. 200

HIPPOLYTUS. Presbyter at Rome. Refutation of
All Heresies
and numerous commentaries . . . . . c. A.D. 220

ORIGEN. Of Alexandria. Successor of Clement,
great philosopher and writer . . . . . . . . . . . c. A.D. 230

DIONYSIUS. Bishop of Alexandria . . . . . . . . . . A.D. 248

EUSEBIUS. Bishop of Caesarea. Ecclesiastical
History
, etc. . . . . . . . . . . . . . . . . . . A.D. 320