Nicene and Post-Nicene Fathers, Ser. II, Vol. II: The Ecclesiastical History of Socrates Scholasticus.: Death of Athanasius, and Elevation of Peter to His See.
Chapter XX.—Death of Athanasius, and Elevation of Peter to His See. 615
It must be said that as long as Athanasius, bishop of Alexandria, was alive, the emperor, restrained by the Providence of God, abstained from molesting Alexandria and Egypt: indeed he knew very well that the multitude of those who were attached to Athanasius was very great; and on that account he was careful lest the public affairs should be hazarded, by the Alexandrians, who are an irritable race, being excited to sedition. But Athanasius, after being engaged in so many and such severe conflicts on behalf of the church, departed this life in the second consulate 616 of Gratian and Probus, having governed that church amidst the greatest perils forty-six years. He left as his successor Peter, a devout and eloquent man.
Sozomen, VI. 19; Theodoret, H. E. IV. 20.
105:616
371 a.d. But Jerome Chronic. II. (ninth year of Valens), makes the consecration of Athanasius’ successor in 373 a.d., and hence also the death of Athanasius himself in the same year. The later date is now universally accepted.