History of the Peloponnesian War

The Boeotians sent off at once for darters and slingers from the Maliac Gulf, and with two thousand Corinthian hoplites, who reinforced them after the battle, as well as the Peloponnesian garrison which had evacuated Nisaea, and some Megarians also, made an expedition against Delium and attacked the fortification. After trying other forms of assault they took it by bringing up an engine made in the following manner.

Having sawed in two a great beam they hollowed it throughout, and fitted it together again nicely like a pipe; then they hung a cauldron at one end of it with chains, and into the cauldron an iron bellows-pipe was let down in a curve[*](ie. it was bent into the cauldron.) from the beam, which was itself in great part plated with iron.

This engine theybrought up from a distance on carts to the part of the wall where it was built chiefly of vines and wood; and when it was near, they inserted a large bellows into the end of the beam next to them and blew through it.

And the blast passing through the air-tight tube into the cauldron, which contained lighted coals, sulphur, and pitch, made a great blaze and set fire to the wall, so that no one could stay on it longer, but all left it and took to flight;

and in this way the fortification was taken. Of the garrison some were slain, and two hundred were captured; but most of the rest got on board their ships and were conveyed home.