History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
Accordingly, they caused the herald to proclaim that they might, if they wished, surrender themselves and their arms to the Athenians, these to decide their fate as should seem good to them.
When the Lacedaemonians heard this, most of them lowered their shields and waved their hands, indicating that they accepted the terms proposed. An armistice was then arranged and a conference was held, Cleon and Demosthenes representing the Athenians and Styphon son of Pharax the Lacedaemonians. Of the earlier Lacedaemonian commanders the first, Epitadas, had been slain and Hippagretas, who had been chosen as next in succession, now lay among the fallen and was accounted dead, though he was still alive;
and Styphon was third in succession, having been originally chosen, as the law prescribed, to be in command in case anything should happen to the other two. He then, and those with him, said that they wished to send a herald over to the Lacedaemonians on the mainland to ask what they must do.
The Athenians, however, would not let any of them go, but themselves summoned heralds from the mainland; then, after interrogatories had been exchanged two or three times, the last man who came over to them from the Lacedaemonians on the mainland brought this message: “The Lacedaemonians bid you decide your case for yourselves, but do nothing dishonourable.” So they took counsel with one another and then surrendered themselves and their arms.