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.
Not long afterwards the Athenians came with thirty ships and six hundred heavy infantry, and the Argives joining them with all their forces, marched out and besieged the men in Orneae for one day; but the garrison escaped by night, the besiegers having bivouacked some way off. The next day the Argives, discovering it, razed Orneae to the ground, and went back again; after which the Athenians went home in their ships.
Meanwhile the Athenians took by sea to Methone on the Macedonian border some cavalry of their own and the Macedonian exiles that were at Athens, and plundered the country of Perdiccas.
Upon this the Lacedaemonians sent to the Thracian Chalcidians, who had a truce with Athens from one ten days to another, urging them to join Perdiccas in the war, which they refused to do. And the winter ended, and with it ended the sixteenth year of this war of which Thucydides is the historian.
Early in the spring of the following summer the Athenian envoys arrived from Sicily, and the Egestaeans with them, bringing sixty talents of uncoined silver, as a month's pay for sixty ships, which they were to ask to have sent them.