Had the reinforcements from Thebes arrived at the expected hour, this disaster would have been averted. But the heavy rain and dark night retarded their whole march, while the river Asôpus was so much swollen as to be with difficulty fordable: so that before they reached the gates of Platæa, their comrades within were either slain or captured. Which fate had befallen them, the Thebans without could not tell: but they immediately resolved to seize what they could find, persons as well as property, in the Platæan territory,—no precautions having been taken as yet to guard against the perils of war by keeping within the walls,—in order that they might have something to exchange for such Thebans as were prisoners. Before this step could be executed, however, a herald came forth from the town to remonstrate with them upon their unholy proceeding in having so flagrantly violated the truce, and especially to warn them not to do any wrong without the walls. If they retired without inflicting farther mischief, their prisoners within should be given up to them; if otherwise, these prisoners would be slain immediately. A convention having been concluded and sworn to on this basis, the Thebans retired without any active measures. Such at least was the Theban account of what preceded their retirement: but the Platæans gave a very different statement; denying that they had made any categorical promise or sworn any oath,—and affirming that they had engaged for nothing, except to suspend any decisive step with regard to the prisoners until discussion had been entered into to see if a satisfactory agreement could be concluded. As Thucydidês records both of these statements, without intimating to which of the two he himself gave the preference, we may presume that both of them found credence with respectable persons. The Theban story is undoubtedly the most probable: but the Platæans appear to have violated the understanding, even upon their own construction of it. For no sooner had the Thebans retired, than they (the Platæans) hastily brought in their citizens and the best of their movable property within the walls, and then slew all their prisoners forthwith; without even entering into the formalities of negotiation. The prisoners thus put to death, among whom was Eurymachus himself, were one hundred and eighty in number.[206] [206] Thucyd. ii, 5, 6; Herodot. vii, 233. Demosthenês (cont. Neæram, c. 25, p. 1379) agrees with Thucydidês in the statement that the Platæans slew their prisoners. From whom Diodorus borrowed his inadmissible story, that the Platæans gave up their prisoners to the Thebans, I cannot tell (Diodor. xii, 41, 42).