And indeed there was assembled at a meeting-place (in 5th century Britain) a crowd of vast proportions, wives and children among them, drawn by the occasion. The people were present both as spectators and as jurymen. The two parties (Pelagians and Catholics/Orthodox) faced each other, ill matched and on unequal terms. On the one side was divine authority, on the other human presumption; on this side, faith, on that side, bad faith; those owned allegiance to Pelagius, these to Christ.
The holy bishops (who had come from Gaul for the occasion, among whom was St. Germanus of Auxerre) gave the privilege of opening the debate to their opponents, who took up the time of their hearers with empty words drawn out to great length but to little purpose. Then the revered prelates themselves poured out the floods of their eloquence, mingling them with the thunders of the apostle and the Gospels, for their own words were interwoven with the inspired writings and their strongest assertions were supported by the testimony of Scripture. Empty arguments were refuted, the dishonest pleas were exposed, and their authors, as each point was made against them, confessed themselves in the wrong by their inability to reply. The jury of the people could hardly keep their hands off them and were not to be stopped from giving their verdict by their shouts.
Suddenly a man of high military [tribunician] rank, accompanied by his wife, stepped into the middle and put his ten-year-old daughter, who was blind, into the arms of the bishops. They told him to take her to their opponents. But the latter, stung by conscience and much alarmed, joined the parents in begging the bishops to cure the little girl. The bishops, seeing that the people were expectant and their opponents in a humbler frame of mind, offered a short prayer, after which Germanus, filled with the Holy Spirit and in the name of the Trinity, took from his neck the reliquary that always hung at his side and in full view of everybody put it to the eyes of the child.
Immediately it expelled their darkness and filled them with light and truth. The parents were filled with joy at the miracle and the onlookers with awe. From that day onward the false doctrine was so completely uprooted from men’s minds that they looked to the bishops for teaching, with thirsty souls.

Constantius of Lyon, Life of St. Germanus of Auxerre 14-15
St. Germanus of Auxerre, commemorated 31 July