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 the Corcyraeans—for it was night—were afraid they were enemies; but afterwards they recognized them and the ships came to anchor.

On the next day the thirty Attic ships and as many of the Corcyraean as were seaworthy put to sea and advanced against the harbour at Sybota, where the Corinthians lay at anchor, wishing to see whether they would fight.