Description of Greece
Pausanias
Pausanias. Pausanias Description of Greece, Volumes 1-4. Jones, W.H.S. (William Henry Samuel), translator; Ormerod, Henry Arderne, translator. London, New York: W. Heinemann, G.P. Putnam's Sons, 1918-1935.
And here Diaeus sank into utter folly. Although he knew that Critolaus and the whole force of Achaia had put up such a poor fight against Metellus, he nevertheless detached about four thousand, put them under the command of Alcamenes, and despatched them to Megara to garrison the city, and to stay the advance of Metellus and the Romans, should they march that way.