Exasperated by this sudden reversal of his schemes of conquest, and maddened by the sense of hunger which began to be severely felt in his camp, Cortez resolved to strike terror into the ranks of the besiegers, by a vigorous sortie at the head of all his cavalry. First sweeping the avenue by a well directed fire from his heavy guns, which were planted at the main entrance of the fortress, he rushed out, with all his steel clad cavaliers, trampling the unprotected assailants under the iron hoofs of the horses, and dealing death on every side. The mighty mass gave way before the terrific charge of the advancing column, but immediately closed in upon its rear as it passed, till it was completely swallowed up in an interminable sea of fierce and angry foes, whose accumulating waves swept in from every avenue, and threatened to sweep them all away, in despite of the fury and power of their dreaded chargers. Convinced of his danger, the intrepid Castilian wheeled his horse about, and with a furious shout, called on his brave band to break a way through the serried ranks of the enemy. Plunging, rearing and leaping, under the double spur of the rider, and the piercing shafts of his foe, the fiery animals broke in upon the living wall that impeded their way, and rushed fiercely on, trampling down hundreds in their path, till they regained the open avenue, that was defended by their own artillery. It was not without serious loss, however, that this retreat was achieved. The fierce Aztecs threw themselves upon the horses, in the crowd, hanging upon their legs, sometimes inflicting serious wounds upon them, and sometimes grappling with their riders, dragging them from their saddles, and carrying off to captivity or sacrifice. At the same time, they were sorely beset by showers of stones and darts that poured upon their heads from every building as they passed, battering and breaking their armor, and terribly bruising both the horse and his rider. These sorties were several times repeated, but always with the same doubtful success. The loss of the Spaniards was always much less than that of their enemy. But the latter could better afford to lose a thousand, than the former to lose one. Their ranks were instantly replenished with fresh combatants, who crowded in upon the scene of conflict, like the countless thousands of the over-peopled North, that swarmed upon the fair fields of Italy, as if some used-up world had been suddenly emptied of its inhabitants. Their numbers seemed rather to increase than to diminish with every new onset. In the same proportion their fierce resolution increased.