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.
After taking up their dead the Athenians sailed off home, while Clearidas and his troops remained to arrange matters at Amphipolis.
About the same time three Lacedaemonians—Ramphias, Autocharidas, and Epicydidas—led a reinforcement of nine hundred heavy infantry to the towns in the direction of Thrace, and arriving at Heraclea in Trachis reformed matters there as seemed good to them.