XXX. His friendship for Peirithous is said to have arisen in the following manner: He had a great reputation for strength and courage; Peirithous, wishing to make trial of these, drove his cattle away from the plain of Marathon, and when he learned that Theseus was pursuing them, armed, he did not retire, but turned and faced him. Each man then admiring the beauty and courage of his opponent, refrained from battle, and first Peirithous holding out his hand bade Theseus himself assess the damages of his raid upon the cattle, saying that he himself would willingly submit to whatever penalty the other might inflict. Theseus thought no more of their quarrel, and invited him to become his friend and comrade; and they ratified their compact of friendship by an oath. Hereupon, Peirithous, who was about to marry Deidameia, begged Theseus to come and visit his country and meet the Lapithae. He also had invited the Centaurs to the banquet; and as they in their drunken insolence laid hands upon the women, the Lapithae attacked them. Some of them they slew, and the rest they overcame, and afterwards, with the assistance of Theseus, banished from their country. Herodorus, however, says that this is not how these events took place, but that the war was going on, and that Theseus went to help the Lapithae and while on his way thither first beheld Herakles, whom he made a point of visiting at Trachis, where he was resting after his labours and wanderings; and that they met with many compliments and much good feeling on both sides. But one would more incline to those writers who tell us that they often met, and that Herakles was initiated by Theseus's desire, and was also purified before initiation at his instance, which ceremony was necessary because of some reckless action.