At last the fugitives reached the spot where the cannon and cavalry had been placed in reserve. Here Cortez rallied them, and charged the Aztecs with the little body of horse, while the artillery opened a hot fire upon them. He then sent orders to the other two columns to fall back and, when these had rejoined him, the division retired, Cortez covering the movement with the cavalry. As soon as they were freed from the city, Tapia was sent round on horseback to acquaint the other commanders of the failure. They had advanced at the same time as Cortez, and had on their side nearly gained the square; when they, too, were startled by the blast of Guatimozin's horn, and by the terrible yell that followed it. Then they heard the sound of battle, which had before been clearly audible, roll away in the distance; and knew that the division of Cortez had been driven back. In a short time the attack upon themselves increased in fury, as the troops who had been engaged with Cortez returned and joined in the attack upon them. Two or three bloody heads were thrown among them, with shouts of "Malinzin!" Although Sandoval and Alvarado did not credit the death of their commander, they felt that it was useless to persevere, and indeed were unable to withstand the furious assaults of the Aztecs. With great difficulty they drew off their troops to the entrenchment on the causeway, and here the guns of the ships, sweeping the road, drove back their assailants. The greatest anxiety prevailed as to the fate of Cortez, until Tapia arrived, bleeding from several wounds, which he had received from parties of men whom Guatimozin had stationed to interrupt the communication between the two camps. Sandoval at once rode round. He, too, was attacked on the road; but his armor, and that of his horse protected him from the missiles showered upon them. On arriving at the camp, he found the troops much dispirited. Numbers had been killed and wounded, and no less than sixty-two Spaniards, with a multitude of allies, had fallen into the hands of the enemy. Indeed, the column around Alderete had been almost entirely destroyed, and two guns and seven horses had been lost. Cortez explained to his follower the cause of the disaster, and told Sandoval that, as he should be unable to take the field for a few days, he must take his place, and watch over the safety of the camps.