Church History by Eusebius Pamphilius
Chapter XIX.--The Rulers of the Churches of Rome and Alexandria during the Reign of Verus.
1. In the eighth year of the above-mentioned reign Soter succeeded Anicetus as bishop of the church of Rome, after the latter had held office eleven years in all. But when Celadion had presided over the church of Alexandria for fourteen years he was succeeded by Agrippinus.