Eusebius, Ecclesiastical History, VIII, 13. "In the second year of (Titus), Linus, who had been bishop of the church of Rome for twelve years, delivered his office to Anencletus."
Ecclesiastical History, VIII, 15. "In the twelfth year of (Domitian) Clement succeeded Anencletus after the latter had been bishop of the church of Rome for twelve years."
Jerome, Chronicon, AD 80, 2nd year of Titus: "Cletus (also called Anencletus) is appointed second bishop of the Roman church for 12 years."
Chronicon, AD 92, 12th of Domitian: "Clement presided as the 3rd bishop of the Church of Rome for nine years."
