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.
The Chians and Lesbians also took part in the expedition with fifty ships. And when this armament of the Athenians put to sea, the Peloponnesians whom they left in Attica were already in the Paralian district.
On reaching Epidaurus in the Peloponnesus the Athenians ravaged most of that land; they also attacked the city, but, though they at first had hopes of taking it, they did not succeed.