At the same time the servant of one Tetradius, a man of proconsular rank, having been laid hold of by a demon, was tormented with the most miserable results. Martin, therefore, having been asked to lay his hands on him, ordered the servant to be brought to him; but the evil spirit could, in no way, be brought forth from the cell in which he was: he showed himself so fearful, with ferocious teeth, to those who attempted to draw near. Then Tetradius throws himself at the feet of the saintly man, imploring that he himself would go down to the house in which the possessed of the devil was kept. But Martin then declared that he could not visit the house of an unconverted heathen. For Tetradius, at that time, was still involved in the errors of heathenism. He, therefore, pledges his word that if the demon were driven out of the boy, he would become a Christian. Martin, then, laying his hand upon the boy, cast the evil spirit out of him. On seeing this, Tetradius believed in the Lord Jesus, and immediately became a catechumen, while, not long after, he was baptized; and he always regarded Martin with extraordinary affection, as having been the author of his salvation.

About the same time, having entered the dwelling of a certain householder in the same town, he stopped short at the very threshold, and said, that he perceived a horrible demon in the courtyard of the house. When Martin ordered it to depart, it laid hold of a certain member of the family, who was staying in the inner part of the house; and the poor wretch began at once to rage with his teeth, and to lacerate whomsoever he met. The house was thrown into disorder; the family was in confusion; and the people present took to flight. Martin threw himself in the way of the frenzied creature, and first of all commanded him to stand still. But when he continued to gnash with his teeth, and, with gaping mouth, was threatening to bite, Martin inserted his fingers into his mouth, and said, "If you possess any power, devour these." But then, as if red-hot iron had entered his jaws, drawing his teeth far away he took care not to touch the fingers of the saintly man; and when he was compelled by punishments and tortures, to flee out of the possessed body, while he had no power of escaping by the mouth, he was cast out by means of a defluxion of the belly, leaving disgusting traces behind him.