Those who safely passed this final ditch were at the end of their immediate peril. Soon they were off the causeway and on solid ground, where the roar of the battle came more faintly to their ears. But word came to them that the rear-guard was in imminent danger and would be overwhelmed unless relieved. It seemed an act of desperation to return, but the valiant and warm-hearted cavaliers did not hesitate when this cry for aid was heard. Turning their horses, they galloped back, pushed through the pass, swam the canal again, and rode into the thick of the fight on the opposite section of the causeway.
The night was now passing, and the first gray light of day was visible in the east. By its dim illumination the frightful combat could be seen in all its horrid intensity. Everywhere lay dead bodies of Christian or pagan; the dark masses of the warriors could be seen locked in deadly struggle crowding the blood-stained causeway; while the lake, far and near, was crowded with canoes, filled with armed and ardent Aztec warriors, yelling their triumphant war-cry.
Cortez and his companions found Alvarado, who led the rear, unhorsed and wounded, yet fighting like a hero. His noble steed, which had borne him safely through many a hard fight, had fallen under him. With a handful of followers he was desperately striving to repel the overwhelming tide of the enemy which was pouring on him along the causeway, a dozen of the Indians falling for every Spaniard slain. The artillery had done good work in the early part of the contest, but the fury of the assault had carried the Aztecs up to and over the guns, and only a hand-to-hand conflict remained. The charge of the returning cavaliers created a temporary check, and a feeble rally was made, but the flood of foes soon came on again and drove them resistlessly back.
Cortez and the cavaliers with him were forced to plunge once more into the canal, not all of them this time escaping. Alvarado stood on the brink for a moment, uncertain what to do, death behind him and deadly peril before. He was a man of great strength and agility, and despair now gave him courage. Setting his long lance firmly on the wreck that strewed the bottom, he sprang vigorously forward and cleared the wide gap at a bound, a feat that filled all who saw it with amazement, the natives exclaiming, as they beheld the seemingly impossible leap, "This is truly the _Tonatiuh_,—the child of the Sun!" This name they had given Alvarado from his fair features and flaxen hair. How great the leap was no one has told us, though the name of "Alvarado’s leap" still clings to the spot.