History of the Peloponnesian War

It was in such wise, for an affront in love, that the plot of Harmodius and Aristogeiton was first conceived and their reckless attempt made under the influence of their momentary alarm.

After this the tyranny became harsher for the Athenians, and Hippias, being now in greater apprehension, not only put to death many of the citizens, but also began to look abroad, to see if in any quarter he might find any door of safety open to him in case of a revolution.