History of the Peloponnesian War

Thucydides

Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.

During the same summer also the Dians took Thyssus, a town on the promontory of Athos, which was in alliance with the Athenians.

All this summer there was intercourse between the Athenians and Lacedaemonians, but both parties began to suspect one another directly after the conclusion of the treaty, owing to their failure to give back to one another the places specified.