History of the Peloponnesian War

At any rate, when, after plying the Athenians and their allies with missiles all day from every quarter, they saw them now distressed by wounds and other sufferings, Gylippus with the Syracusans and allies made a proclamation, in the first place, that any of the islanders who chose should come over to them, on condition of retaining his liberty: and some few states went over.

Afterwards, terms were made with all the troops under Demosthenes, that they should surrender their arms, and that no one should be put to death, either by violence, or imprisonment, or want of such nourishment as was most absolutely requisite.

Thus there surrendered, in all, to the number of six thousand; and the whole of the money in their possession they laid down, throwing it into the hollow of shields, four of which they filled with it. These they immediately led back to the city, while Nicias and his division arrived that day on the banks of the river Erineus; having crossed which, he posted his army on some high ground.

The Syracusans, having overtaken him the next day, told him that Demosthenes and his division had surrendered themselves, and called on him also to do the same. Being incredulous of the fact, he obtained a truce to enable him to send a horseman to see.

When he had gone, and brought word back again that they had surrendered, Nicias sent a herald to Gylippus and the Syracusans, saying that he was ready to agree with the Syracusans, on behalf of the Athenians, to repay whatever money the Syracusans had spent on the war, on condition of their letting his army go; and that until the money was paid, he would give Athenians as hostages, one for every talent.