Cf. an account of these events in Sozomen, I. 3. See also on the persecution instituted by Diocletian Neander, Hist. of the Christ. Ch. Vol. I. pp. 143–156; Schaff, Hist. of the Christ. Ch. Vol. I. pp. 174–177; Euseb. H. E., Books VIII.–X. Lactantius, de Mortibus persec. c. 7 seq. Diocletian abdicated in 305 a.d.