History of the Peloponnesian War

Also Theramenes, the son of Agnon, an able man both for elocution and understanding, was another of the principal of those that overthrew the democracy. So that it is no marvel if the business took effect, being by many and wise men conducted, though it were a hard one. For it went sore with the Athenian people, almost a hundred years after the expulsion of the tyrants, to be now deprived of their liberty, having not only not been subject to any, but also for the half of this time been inured to dominion over others.

When the assembly, after it had passed these things, no man contradicting, was dissolved, then afterwards they brought The Four Hundred into the council-house in this manner. The Athenians were evermore partly on the walls and partly at their arms in the camp in regard of the enemy that lay at Deceleia.

Therefore, on the day appointed, they suffered such as knew not their intent to go forth as they were wont. But to such as were of the conspiracy they quietly gave order not to go to the camp itself but to lag behind at a certain distance, and if any man should oppose what was in doing, to take arms and keep them back.