History of the Peloponnesian War

The Plataeans, when they had gone six or seven furlongs, forsook the Theban way and turned into that which led towards the mountain to Erythrae and Hysiae and, having gotten the hills, escaped through to Athens, being two hundred and twelve persons of a greater number. For some of them returned into the city before the rest went over, and one of their archers was taken upon the ditch without. And so the Peloponnesians gave over the pursuit and returned to their places.

But the Plataeans that were within the city, knowing nothing of the event and those that turned back having told them that not a man escaped, as soon as it was day sent a herald to entreat a truce for the taking up of their dead bodies; but when they knew the truth, they gave it over. And thus these men of Plataea passed through the fortification of their enemies and were saved.

About the end of the same winter Salaethus, a Lacedaemonian, was sent in a galley to Mytilene and, coming first to Pyrrha and thence going to Mytilene by land, entered the city by the dry channel of a certain torrent, which had a passage through the wall of the Athenians, undiscovered. And he told the magistrates that Attica should again be invaded and that the forty galleys which were to aid them were coming, and that himself was sent afore both to let them know it and withal to give order in the rest of their affairs.

Hereupon the Mytilenaeans grew confident and hearkened less to composition with the Athenians. And the winter ended, and the fourth year of this war written by Thucydides.