Eusebius Book 2, Section 24

2.24.1

XXIV. Νέρωνος δὲ ὄγδοον ἄγοντος τῆς βασιλείας ] ἔτος, πρῶτος μετὰ Μάρκον τὸν εὐαγγελιστὴν τῆς ἐν Ἀλεξανδρείᾳ παροικίας Ἀνιανὸς τὴν λειτουργίαν διαδέχεται.

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XXIV. In the eighth year of the reign of Nero, Annianus was the first after Mark the Evangelist to receive charge of the diocese of Alexandria.