History of the Peloponnesian War

The Peloponnesians, on perceiving this, rammed down clay in wattles of reed, and threw it into the breach, that it might not be loose, and so carried away like the soil.

Being thus baffled, the Plataeans ceased from this attempt; but having dug a passage under ground from the city, and having guessed their way under the mound, they began again to carry the soil in to them. And for a long time they escaped the observation of the enemy outside; so that though they continued to throw on materials, they were further from finishing it; as their mound was carried away from beneath, and continually sinking down into the vacuum.

Fearing, however, that they might not even by this means be able to hold out, so few in numbers against so many, they adopted the following additional contrivance. They ceased to work at the great building opposite to the mound; but beginning at either end of it, where the wall was of its original height, they built another in the form of a crescent, running inwards into the city; that if the great wall were taken, this might hold out, and their opponents might have to throw up a second mound against it, and as they advanced within, might have double trouble and be more exposed to missiles on both their flanks.

At the same time that they were raising the mound, the Peloponnesians brought engines also to play upon the city; one of which, being brought up close to the wall, shook down a considerable part of the great building, and terrified the Plataeans. Others were advanced against different parts of the wall; but the Plataeans broke them off by throwing nooses around them. They also suspended great beams by long iron chains from the extremity of two levers, which were laid upon the wall, and stretched out beyond it; and having drawn them up at an angle, whenever the engine was going to fall on any point, by loosing the chains and not holding them tight in hand, they let the beam drop; which, falling on it with great impetus, broke off the [*]( Arnold thinks that the battering engine ended in a point, to force its way into the wall, rather than with a thick solid end, merely to batter it; and so that τὸ προέχον τῆς ἐμβολῆς answers exactly to τὸ τρύτανον in a parallel passage quoted by him from Aeneas Tacticus.) head of the battering-ram.