The fatal signal, the discharge of an arquebuse, was then given. In an instant every musket and cross-bow was levelled at the unfortunate Cholulans in the courtyard, and a frightful volley poured into them as they stood crowded together like a herd of deer in the centre. They were taken by surprise, for they had not heard the preceding dialogue with the chiefs. They made scarcely any resistance to the Spaniards, who followed up the discharge of their pieces by rushing on them with their swords; and, as the half-naked bodies of the natives afforded no protection, they hewed them down with as much ease as the reaper mows down the ripe corn in harvest-time. Some endeavored to scale the walls, but only afforded a surer mark to the arquebusiers and archers. Others threw themselves into the gateways, but were received on the long pikes of the soldiers who guarded them. Some few had better luck in hiding themselves under the heaps of slain with which the ground was soon loaded. While this work of death was going on, the countrymen of the slaughtered Indians, drawn together by the noise of the massacre, had commenced a furious assault on the Spaniards from without. But Cortés had placed his battery of heavy guns in a position that commanded the avenues, and swept off the files of the assailants as they rushed on. In the intervals between the discharges, which, in the imperfect state of the science in that day, were much longer than in ours, he forced back the press by charging with the horse into the midst. The steeds, the guns, the weapons of the Spaniards were all new to the Cholulans. Notwithstanding the novelty of the terrific spectacle, the flash of fire-arms mingling with the deafening roar of the artillery as its thunders reverberated among the buildings, the despairing Indians pushed on to take the places of their fallen comrades.