History of the Peloponnesian War

After this, when their engines were of no avail, and the building of the wall was going on in opposition to the mound, the Peloponnesians, thinking it impossible to take the city by their present means of offence, prepared for circumvallating it.

First however they determined to make an attempt upon it by fire, [and see] whether with the help of a favourable wind they could burn the town, as it was not a large one: for they thought of every possible device, if by any means it might be reduced by them without the expense of a siege.

They took therefore faggots of brushwood, and threw them from the mound; at first into the space between it and the wall, and when that had soon been filled by the many hands at work, they piled them up also as far into the town as they could reach from the height; and then lighted the wood by throwing on it fire with sulphur and pitch.

By this means such a flame was raised as no one had ever yet seen produced by the hand of man; [though natural conflagrations might have exceeded it;] for ere now the wood of a mountain forest has been known to take fire of itself, and to emit a flame in consequence, through the mutual attrition of the boughs by high winds.

This fire, however, was a great one, and was within very little of destroying the Plataeans, after they had escaped all their other dangers; for there was a considerable part of the town within which it was not possible to approach; and if a wind had risen to blow upon it, as their enemy hoped, they would not have escaped.

As it was, however, the following occurrence is also said to have favoured them; a heavy rain and thunder-storm came on, and quenched the flame; and so the danger ceased.