History of the Peloponnesian War

For instance, the mass of the Athenians think that Hipparchus was tyrant when he was slain by Harmodius and Aristogiton; and do not know that Hippias held the government as being the eldest of the sons of Pisistratus, and Hipparchus and Thessalus were his brothers. But Harmodius and Aristogiton having suspected that on that day, and at the very moment, some information had been given to Hippias by their accomplices, abstained from attacking him, as being fore-warned; but as they wished before they were seized to do something even at all hazards, having fallen in with Hipparchus near the Leocorium, as it is called, while arranging the Panathenaic procession, they slew him.