And he, seeing that it was useful to have as a partner in such great cares of the kingdom a man mature in years, and because, as the divine word admonishes: 「Two are better than one」 (Eccl. 4:9), associated Theodosius with himself, and, the administration of the East having been entrusted to him, reserved the Western parts for himself and his brother. But after Theodosius had accomplished many things religiously and bravely, Gratian was slain at Lyons by Maximus the tyrant, who had arisen in Britain, through his general Andragathius—more by the treachery of his own men than by the force of the enemy.