History of the Peloponnesian War

Having sawn a great beam in two, they hollowed out the whole of it, and fitted it nicely together again, like a pipe, and hung by chains at the end of it a caldron, into which was placed an iron bellows-pipe, inclining from the beam, the timber also being for a considerable distance covered with iron.

This they brought up from a distance on carts to that part of the wall where it had been chiefly built of the vines and timber; and when it was near, they applied great bellows to the end of the beam next themselves, and blew them.

The blast passing closely confined into the caldron, which held lighted coals, sulphur, and pitch, produced a great flame, and set fire to a part of the wall; so that no one could any longer stand upon it, but they left it and took to flight; and in this way the fortress was taken.