History of the Peloponnesian War

For one of the Plataeans taking hold of the battlements threw down a tile which made a noise in the fall. And presently there was an alarm, and the army ran to the wall. For in the dark and stormy night they knew not what the danger was, and the Plataeans that were left in the city came forth withal and assaulted the wall of the Peloponnesians on the opposite side to that where their men went over.

So that though they were all in a tumult in their several places, yet not any of them that watched durst stir to the aid of the rest nor were able to conjecture what had happened.

But those three hundred that were appointed to assist the watch upon all occasions of need went without the wall and made towards the place of the clamour.