The only remedy possessed by a garrison against this last method of attack was to keep a good watch and to endeavour to discover the whereabouts of the mine, and neutralise it by a countermine. At the siege of Rennes, in 1356, the governor of the town ordered basins of copper, each containing several globes of the same metal, to be placed all about the ramparts; when these globes were seen to vibrate and tremble at each stroke of the hidden pickaxe, it was easy to guess that the mine was not far off. There was also a body of night watchmen, who carefully noted the enemy’s movements, and who rang the alarm-bell at the slightest noise. These watchmen were often replaced by dogs, whose barks, in case of a surprise, gave notice to the garrison (Fig. 62).
Fig. 63.—Machine intended to break the ranks of the enemy and to crush his soldiers.—Végèce, “L’Art Militaire:” 1532.
Fig. 64.—Machine to shoot arrows, and to assist in approaching a besieged town.—Robert Valturin, “La Discipline Militaire:” 1555.
The slow and laborious work of the miner was often advantageously replaced by the more powerful action of certain machines, which may be divided into two distinct classes. The first, intended to be used at close quarters and to make a breach in the wall, comprised several varieties of the ancient battering-ram; the second, employed at a distance, were termed pierriers, mangonneaux, espringales, &c. (Figs. 63 and 64).
The battering-ram, which was probably well known from the remotest periods, is described, in the documents of the Middle Ages, pretty much as we see it figured on the monuments of Nineveh. “On Easter day,” says the anonymous author of the chronicle of the “Albigeois,” “the bosson (the southern name of the battering-ram) was placed in position; it is long, iron-headed, straight, and pointed, and it so hammered, and pierced, and smashed, that the wall was broken through (Fig. 65); but they (the besieged) lowered a loop of rope suspended from a machine, and in this noose the bosson was caught and retained.”
Fig. 65.—Battering-ram.—From a Miniature in Manuscript 17,339 in the National Library of Paris.
Generally speaking, the battering-ram was a long, heavy beam, suspended in the centre from a kind of massive trestle. The end which battered the wall was either covered with an iron hood or pointed with brass. The beam was swung backward and forward by the besiegers, and by dint of striking a wall always in the same spot it often succeeded in shattering or overthrowing it. At other times the ram, instead of being suspended in an oscillating manner, was mounted on wheels, and ran forward with great rapidity against the wall to be battered. The chronicle of the “Albigeois,” just quoted, alludes to the head of the ram being caught in a noose; besides this manœuvre, the garrison would hurl stones and pieces of timber upon it, in order to break it or to put it out of trim; or else they would strive to deaden its blows by interposing a thick mattress of wool covered with leather between it and the stonework of their stronghold.