The testimonies of Irenæus, Justin Martyr, Tertullian, Novatianus, Theophilus, Origen, (who lived in the two first centuries after Christ was born, or thereabouts;) : as also, of Arnobius, Lactantius, Eusebius, Hilary, and Brightman; concerning that one God, and the persons of the Holy Trinity. Together with observations on the same.