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.
Against these the Athenians sailed out from Naupactus with thirty-three ships under the command of Diphilus.[*](He seems to have brought a reinforcement of fifteen ships and to have superseded Conon (cf. 7.31.4).)
At first the Corinthians kept quiet; then the signal was raised, when the moment seemed favourable, and advancing against the Athenians they engaged them. And for a long time they withstood one another. Three ships of the Corinthians were destroyed;