Church History by Eusebius Pamphilius
Chapter XIII.--Anencletus, the Second Bishop of Rome.
After Vespasian had reigned ten years Titus, his son, succeeded him. In the second year of his reign, Linus, who had been bishop of the church of Rome for twelve years, delivered his office to Anencletus. But Titus was succeeded by his brother Domitian after he had reigned two years and the same number of months.