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.
They also sent envoys to Lacedaemon and Corinth to negotiate their restoration; but meeting with no success, afterwards got together boats and mercenaries and crossed over to the island, being about six hundred in all;
and burning their boats so as to have no hope except in becoming masters of the country, went up to Mount Istone, and fortifying themselves there, began to annoy those in the city and obtained command of the country.
At the close of the same summer the Athenians sent twenty ships under the command of Laches, son of Melanopus, and Charceades, son of Euphiletus, to Sicily,