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.
Meanwhile the fleet from Corinth and from the other allies on the Crisaean Gulf, which was to have joined Cnemus in order to prevent the Acarnanians on the sea-coast from aiding those in the interior, did not arrive, Iut was obliged, about the day of the battle at Stratus, to fight with Phormio and the twenty Athenian ships which were on guard at Naupactus.