Thucydides, History of the Peloponnesian War
Benjamin Jowett, Ed.

98. When this new revolution began, Peisander, Alexicles, and the other leaders of the oligarchy¹ stole away to Decelea; all except Aristarchus, who, being one of the generals at the time, gathered round him hastily a few archers of the most barbarous sort and made his way to Oenoè. [2] This was an Athenian fort on the borders of Boeotia which the Corinthians², having called the Boeotians to their aid, were now besieging on their own account, in order to revenge an overthrow inflicted by the garrison of Oenoè upon a party of them who were going home from Decelea. [3] Aristarchus entered into communication with the besiegers, and deceived the garrison by telling them that the Athenian government had come to terms with the Lacedaemonians, and that by one of the conditions of the peace they were required to give up-the place to the Boeotians. They, trusting him, whom they knew to be a general, and being in entire ignorance of what had happened because they were closely invested, capitulated and came out. [4] Thus Oenoè was taken and occupied by the Boeotians; and the oligarchical revolution at Athens came to an end.