History of the Peloponnesian War

At length, when many dead were now heaped one upon another in the river, and the army was destroyed, either at the river, or, even if any part had escaped, by the cavalry, Nicias surrendered himself to Gylippus, placing more confidence in him than in the Syracusans; and desired him and the Lacedaemonians to do what they pleased with himself, but to stop butchering the rest of the soldiers. After this, Gylippus commanded to make prisoners;

and they collected all that were alive, excepting such as they concealed for their own benefit (of whom there was a large number). They also sent a party in pursuit of the three hundred, who had forced their way through the sentinels during the night, and took them.

The part of the army, then, that was collected as general property, was not large, but that which was secreted was considerable; and the whole of Sicily was filled with them, inasmuch as they had not been taken on definite terms of surrender, like those with Demosthenes.

Indeed no small part was actually put to death; for this was the most extensive slaughter, and surpassed by none of all that occurred in this Sicilian war. In the other encounters also, which were frequent on their march, no few had fallen. But many also escaped, nevertheless; some at the moment, others after serving as slaves, and running away subsequently. These found a place of refuge at Catana.