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.
The Corcyraeans had been in a state of revolution ever since the home-coming of the captives who had been taken in the two sea-fights off Epidamnus[*](cf. 1.47.-1.55) and had been released by the Corinthians. They had nominally been set free on bail in the sum of eight hundred talents[*](£160,000, $776,000.) pledged by their proxeni, but in fact they had been bribed to bring Corcyra over to the Corinthian side.
And these men had been going from citizen to citizen and intriguing with them, with a view to inducing the city to revolt from Athens. And on the arrival of an Attic and Corinthian ship bringing envoys, and after the envoys had held conferences with them, the Corcyraeans voted to continue to be allies to the Athenians according to their agreement,[*](The agreement was for a defensive alliance (ἐπιμαχία); cf. 1.44.1.) but on the other hand to renew their former friendship with the Peloponnesians.