History of the Peloponnesian War

With regard to Hippias, having retained the tyranny at Athens three years longer, and being deposed in the fourth year by the Lacedaemonians and the banished Alcmaeonidae he went, under treaty, to Sigeum, then to Aeantides at Lampsacus, and thence to the court of king Darius; from which also he set out twenty years after, when now an old man, and accompanied the Median forces to Marathon.

Reflecting, then, on these things, and recalling to mind all that they knew by report concerning them, the Athenian people was wrathful at that time, and suspicious of those who had incurred accusation on the subject of the mysteries, and thought that every thing had been done on the strength of a conspiracy for establishing an oligarchy, or a tyranny.

So when, in consequence of their anger on this account, many persons of consideration were already in prison, and the matter appeared not to be stopping, but they were daily proceeding to greater severity and to more numerous arrests; under these circumstances one of the men in confinement, who was thought to be the most guilty of them, was persuaded by one of his fellow prisoners to give information, whether true or not; for suppositions are entertained both ways, and the certain fact respecting those who had done the deed no one was either able to state then, or has since been able.

By his arguments then he persuaded him, that he ought, even if he had not done the deed, both to save himself by gaining a promise of impunity, and to stop his country from its present suspiciousness: for that his preservation was more sure, if he confessed with a promise of impunity, than if he denied it, and were brought to trial.