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.
On the next day they were no more inclined to attack the city, though the inhabitants were in a state of great confusion and fear, and though Brasidas, it is said, urged Alcidas to do so, but did not have equal authority with him. Instead, they merely landed on the promontory of Leucimne and ravaged the fields.
Meanwhile the people of Corcyra, becoming alarmed lest the ships should attack them, conferred with the suppliants and also with the other members of the opposite faction on the best means of saving the city. And some of them they persuaded to go on board the ships; for in spite of all the Corcyraeans had manned thirty ships.
But the Peloponnesians, after ravaging the land till midday, sailed away, and toward night a signal was flashed to them that sixty Athenian ships were approaching from Leucas. These ships had been sent by the Athenians, under the command of Eurymedon son of Thucles, when they learned of the revolution at Corcyra and that the fleet under Alcidas was about to sail thither.