History of the Peloponnesian War

But seeing they would not hearken unto him, he led his army presently against Torone of Chalcidea, held by the Athenians. He was called in by the few, who were ready withal to deliver him the city; and arriving there a little before break of day, he sat down with his army at the temple of Castor and Pollux, distant about three furlongs from the city.

So that to the rest of the city and to the Athenian garrison in it, his coming was unperceived. But the traitors, knowing he was to come (some few of them being also privily gone to him), attended his approach; and when they perceived he was come, they took in unto them seven men armed only with daggers (for of twenty appointed at first to that service, seven only had the courage to go in; and were led by Lysistratus of Olynthus); which, getting over the wall towards the main sea unseen, went up (for the town standeth on a hill's side) to the watch that kept the upper end of the town, and having slain the watchmen brake open the postern gate towards Canastraea.