History of the Peloponnesian War

When the Corinthians therefore had sight of these galleys, suspecting that they were of Athens and more in number than they were, by little and little they fell off.

But the Corcyraeans (because the course of these galleys was unto them more out of sight) described them not but wondered why the Corinthians rowed astern, till at last some that saw them said they were enemies, and then retired also the Corcyraeans.

For by this time it was dark, and the Corinthians had turned about the heads of their galleys and dissolved themselves.

And thus were they parted, and the battle ended in night. The Corcyraeans lying at Leucimna, these twenty Athenian galleys under the command of Glaucon the son of Leagrus and Andocides the son of Leogorus, passing through the midst of the floating carcasses and wrecks, soon after they were described arrived at the camp of the Corcyraeans in Leucimna.

The Corcyraeans at first (being night) were afraid they had been enemies, but knew them afterwards; so they anchored there.