The Lacedaemonians, I say, thus counselled the men of Plataia; and they did not fail to follow their counsel, but when the Athenians were doing sacrifice to the twelve gods, they sat down as suppliants at the altar and so gave themselves. Then the Thebans having been informed of these things marched against the Plataians, and the Athenians came to their assistance: and as they were about to join battle, the Corinthians did not permit them to do so, but being by chance there, they reconciled their strife; and both parties having put the matter into their hands, they laid down boundaries for the land, with the condition that the Thebans should leave those of the Boeotians alone who did not desire to be reckoned with the other Boeotians. The Corinthians having given this decision departed; but as the Athenians were going back, the Boeotians attacked them, and having attacked them they were worsted in the fight. Upon that the Athenians passed beyond the boundaries which the Corinthians had set to be for the Plataians, and they made the river Asopos itself to be the boundary of the Thebans towards the land of Plataia and towards the district of Hysiai. The Plataians then had given themselves to the Athenians in the manner which has been said, and at this time they came to Marathon to bring them help.