"Charge!" bellowed Roger, at the top of his voice. "Do not give them time to rally, but press them."

Not one of the Aztecs understood his words, but all heard his shout; and when they saw their young leader throw himself impetuously on the Spaniards with his sword, they gathered together and rushed forward with their lances. At the same time those who had been trained to follow in rear of the men who held the lances dashed through the gaps in their ranks, and fell upon the enemy furiously; indeed, never before had the Spaniards met with such fierce opposition or such strenuous attack. On former occasions their numerous allies had been able to help them, for they had an unbounded faith in their masters, just as the Mexicans had in Roger. But these new methods of warfare astounded and disheartened them, and the shafts from the crossbows did the rest. They retreated early in the encounter, leaving the Spaniards to themselves. Then the lance-bearers amongst Cortes' men gave way, leaving only the swordsmen. It was an opportunity, and Roger and his men took it.

"Coming!" shouted Philip, as he saw his friend dash out against the head of the enemy. "Now, into their very centre!"

He flung his men on the flank of the swordsmen, and combining with Roger's part, caused the Spaniards to stagger. A number fell, pierced by the lances; then the remainder turned and attempted to flee. But the active natives were on them promptly, and of the number who had advanced at a run to the attack, only a few returned to their friends; the rest were slain, and lay where they fell.

"Let the men retire!" said Roger to Teotlili, as his lancemen began to gather together again, looking as if they would like to push on to the camp of the enemy. "Tell them to get behind the wall again, and wait for orders. These trained bands are too valuable to have their lives thrown away."

Accordingly the Mexican noble whistled shrilly, and very soon all were back behind the wall. But their feelings now were very different. They had, for the very first time since they had met with the Spaniards, defeated them in the open, and their jubilation was great.

"Truly the manœuvre was well planned and most effective," said Teotlili, as he came to Roger's side. "The king was looking at us as we fought, and his messenger has just come with his thanks."

"Then tell him that we must fail next time," answered Roger, calmly. "The enemy will bring up all their strength, and we shall be forced to give way. But we can renew the conflict elsewhere. Let him keep that in mind, and not show displeasure or disappointment if we are beaten. And, Teotlili——"

"What next, my lord?"

"Make complete arrangements for the retirement of the men. Some must take to the boats, while others can run by means of the aqueduct. All the crossbow-men are to retire last, and are to harass the enemy as they go. They can lie off in the canoes and fire from the water."