During the long period of the conflagration, the Spaniards made no attempt to extinguish the flames. Such an attempt would have availed nothing. Yet they did not tamely submit to the assaults of the enemy, and they sallied forth from time to time to repel them. But the fallen timbers and scattered rubbish of the houses presented serious impediments to the movements of horse; and, when these were partially cleared away by the efforts of the infantry and the Indian allies, the Peruvians planted stakes and threw barricades across the path, which proved equally embarrassing.13 To remove them was a work of time and no little danger, as the pioneers were exposed to the whole brunt of the enemy's archery, and the aim of the Peruvian was sure. When at length the obstacles were cleared away, and a free course was opened to the cavalry, they rushed with irresistible impetuosity on their foes, who, falling back in confusion, were cut to pieces by the riders, or pierced through with their lances. The slaughter on these occasions was great; but the Indians, nothing disheartened, usually returned with renewed courage to the attack, and, while fresh reinforcements met the Spaniards in front, others, lying in ambush among the ruins, threw the troops into disorder by assailing them on the flanks. The Peruvians were expert both with bow and sling; and these encounters, notwithstanding the superiority of their arms, cost the Spaniards more lives than in their crippled condition they could afford to spare,--a loss poorly compensated by that of tenfold the number of the enemy. One weapon, peculiar to South American warfare, was used with some effect by the Peruvians. This was the lasso, a long rope with a noose at the end, which they adroitly threw over the rider, or entangled with it the legs of his horse, so as to bring them both to the ground. More than one Spaniard fell into the hands of the enemy by this expedient.14 Thus harassed, sleeping on their arms, with their horses picketed by their side, ready for action at any and every hour, the Spaniards had no rest by night or by day. To add to their troubles, the fortress which overlooked the city, and completely commanded the great square in which they were quartered, had been so feebly garrisoned in their false sense of security, that, on the approach of the Peruvians, it had been abandoned without a blow in its defence. It was now occupied by a strong body of the enemy, who, from his elevated position, sent down showers of missiles, from time to time, which added greatly to the annoyance of the besieged. Bitterly did their captain now repent the improvident security which had led him to neglect a post so important.