The Church History, Book 4
Primus and Alexander
About the twelfth year of Trajan’s reign, the bishop of the church at Alexandria whom we mentioned a little earlier departed this life, and Primus, fourth from the apostles, was chosen for the ministry there. At this time, too, Alexander, fifth in the succession from Peter and Paul, took up the office of bishop at Rome, Evaristus having completed his eighth year.