Library Eusebius of Caesarea Church History
Book 5
Chapter 9: The Bishops under Commodus
1. After Antoninus had been emperor for nineteen years, Commodus received the government. In his first year Julian became bishop of the Alexandrian churches, after Agripinnus had held the office for twelve years.
English translation by Arthur Cushman McGiffert, in Nicene and Post-Nicene Fathers, Series II, Vol. I (eds. Philip Schaff and Henry Wace; Buffalo: Christian Literature Publishing Co., 1890). Public domain. Digital text via New Advent Church Fathers.