History of the Peloponnesian War

At intervals of every ten battlements were towers of considerable size, and the same breadth as the wall, reaching right across from its inner to its outer face, with no means of passing except through the middle.

Accordingly on stormy and wet nights the battlements were deserted, and guard kept from the towers, which were not far apart and roofed in above.Such being the structure of the wall by which the Plataeans were blockaded,

when their preparations were completed, they waited for a stormy night of wind and rain and without any moon, and then set out, guided by the authors of the enterprise. Crossing first the ditch that ran round the town, they next gained the wall of the enemy unperceived by the sentinels, who did not see them in the darkness, or hear them, as the wind drowned with its roar the noise of their approach;