As the fortress was to be approached through the mountain passes, it became necessary to divert the enemy’s attention to another quarter. A little while before sunset Juan Pizarro left the city with a picked corps of horsemen, and took a direction opposite to that of the fortress, that the besieging army might suppose the object was a foraging expedition. But, secretly countermarching in the night, he fortunately found the passes undefended and arrived before the outer wall of the fortress without giving the alarm to the garrison. The entrance was through a narrow opening in the center of the rampart; but this was now closed up with heavy stones that seemed to form one solid work with the rest of the masonry. It was an affair of time to dislodge these huge masses in such a manner as not to rouse the garrison. The Indian natives, who rarely attacked in the night, were not sufficiently acquainted with the art of war even to provide against surprise by posting sentinels. When the task was accomplished, Juan Pizarro and his gallant troop rode through the gateway and advanced towards the second parapet. But their movements had not been conducted so secretly as to escape notice, and they now found the interior court swarming with warriors, who, as the Spaniards drew near, let off clouds of missiles that compelled them to come to a halt. Juan Pizarro, aware that no time was to be lost, ordered one-half of his corps to dismount, and, putting himself at their head, prepared to make a breach as before in the fortifications. Leading on his men, he encouraged them in the work of demolition in the face of such a storm of stones, javelins, and arrows as might have made the stoutest heart shrink from encountering it. The good mail of the Spaniards did not always protect them; but others took the place of such as fell, until a breach was made, and the cavalry, pouring in, rode down all who opposed them.