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.
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.