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.
And for six or seven stadia the Plataeans proceeded on the road toward Thebes, then turned and followed that leading towards Erythrae and Hysiae, and reaching the mountains escaped to Athens. They were only two hundred and twelve men out of a larger number; for some had turned back to the town without trying to climb the wall, and one man, an archer, had been taken at the outer ditch. The Peloponnesians, then, desisted from the pursuit and returned to their post.
But the Plataeans in the town, knowing nothing of what had really happened, but informed by those who had turned back that no one survived, sent a herald at daybreak and asked for a truce that they might take up their dead; on learning the truth however, they desisted. So these Plataeans got over the wall in the manner described and reached safety.[*](For the fate of the city and of the Plataeans who remained in it, see chs. lii.-lxviii.)
Toward the close of the same winter, Salae-[*](428 B.C.) thus the Lacedaemonian was sent in a trireme from Lacedaemon to Mytilene. Landing at Pyrrha and proceeding thence on foot, he followed the bed of a ravine, where the circuit-wall could be crossed, and came undetected into Mytilene. He told the magistrates that there would be an invasion of Attica and that simultaneously the forty ships[*](cf. 3.16.3.) which were to come to their aid would arrive, adding that he himself had been sent ahead to make these announcements and also to take charge of matters
in general. Accordingly the Mytilenaeans were encouraged and were less inclined than ever to make terms with the Athenians. So this winter ended, and with it the fourth year of this war of which Thucydides wrote the history.