Then forty picked men, who had been specially told off for the task, tried to raise it so that it might be carried to the front; but the weight of the baggage wagons and artillery had so wedged it into the earth, that they were unable to move it. They persevered in their efforts until most of them had fallen. The rest bore the terrible news to the army that the bridge was immovable. A terrible cry of despair arose, as the news spread. All hope seemed lost and, regardless of order or discipline, all pressed forward to endeavor, in some way or other, to cross the obstacle that barred their way. Pressed on by those behind them, Sandoval and his cavaliers dashed into the water. The distance was short, but the horses were weak from hunger, and burdened by their own heavy armor and that of their riders. Some succeeded in swimming across. Others sank; while some reached the opposite side, only to fall back again, as they tried to climb the steep bank. The infantry followed them, throwing away their armor to enable them to swim. Some succeeded, others were pressed down by their comrades. Many were killed by the war clubs or spears of the Mexicans in their canoes. Others again, half stunned by the clubs, were dragged into the canoes and carried off to the city to be sacrificed. All along the causeway the fight raged unceasingly; the Aztecs in the boats alongside leaping ashore, and grappling with their foes, and rolling with them down the causeway into the water; while those in the distance kept up their rain of missiles. The opening in the causeway was at last filled--choked up with ammunition wagons and guns, bales of rich goods, chests of gold, and the bodies of men and horses--and over these the Spaniards made their way. Cortez had swum or waded across on his horse, and he rode on until he joined Sandoval and the remains of the advanced guard, who were checked at the third and last opening. The cavaliers set the example to their followers by plunging into the water. The rest followed as best they could. Many were drowned by the weight of the gold they carried. Others got across by clinging to the tails and manes of the horses. Cortez, with Sandoval and other cavaliers, led the retreat until they reached the end of the causeway. The din of battle was now far behind, but those who came up brought the news that the rear guard were so sorely pressed, that they would be destroyed unless aid reached them. Cortez and his companions did not hesitate. They dashed along the causeway, again swam the canal, and made their way through the crowd until they reached the rear guard. Morning was breaking now, and it showed the lake covered with canoes filled with warriors. Along the whole length of the causeway a desperate fight was raging.