Possidius

“Augustine strove for nearly ten years, writing and publishing books, and frequently speaking about the Pelagian errors. And since these heretics were trying to bring the apostolic see round to their view, African councils of holy bishops also did their best to persuade the holy Pope of the city (first the venerable Innocent, and afterwards his successor, Zosimus) that this heresy was to be abhorred and condemned by catholic faith. And these bishops of so great a see successively branded them, and cut them off from the members of the Church, giving letters to the African churches in the West, and to the churches of the East, and declared that they were to be anathematized and avoided by all catholics. The judgement pronounced upon them by the Catholic Church of God was heard and followed also by the most pious emperor Honorius, who condemned them by his laws, and ordered them to be treated as heretics. Wherefore many of them have returned to the bosom of holy Mother Church, whence they had wandered, and are yet returning, as the truth of the right faith becomes known against this detestable error.” (Vita Augustini, On Augustine and The Council of Milevis [A.D. 437]).