History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
When the herald brought back from the Corinthians no peaceable answer, and their ships were manned, to the number of eighty sail, (for forty were besieging Epidamnus,) they put out against them, and formed their line, and engaged them:
and the Corcyraeans won a decided victory, and destroyed fifteen ships of the Corinthians. It happened likewise the same day, that those too who were besieging Epidamnus reduced it to surrender, on condition that they should sell the strangers, and keep the Corinthians in bonds, till something else should be determined.
After the battle, the Corcyraeans having set up a trophy on Leucimna, a promontory of Corcyra, slew the other prisoners they had taken, but kept the Corinthians in bonds.