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.
After this they separated, and the Athenians, detaching a sufficient number of ships to blockade those of the enemy, anchored with the rest at the islet adjacent, upon which they proceeded to encamp, and sent to Athens for reinforcements;