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.
and a force of heavy infantry numbering altogether about two thousand, and three hundred Hellenic horse. Fifteen hundred of these he had with him upon Cerdylium; the rest were stationed with Clearidas in Amphipolis.
After remaining quiet for some time, Cleon was at length obliged to do as Brasidas expected.