History of the Peloponnesian War
Thucydides
Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.
Perceiving this, the division opposed to the Corcyraeans fearing a repetition of the disaster of Naupactus, came to support their friends, and the whole fleet now bore down, united, upon the Athenians,
who retired before it, backing water, retiring as leisurely as possible in order to give the Corcyraeans time to escape, while the enemy was thus kept occupied.
Such was the character of this sea-fight, which lasted until sunset.