From time to time another shot had to be fired, notwithstanding the fire, to keep off the howling pack, and in the course of an hour fifteen dead animals lay stretched on the prairie.

The situation of the besieged was, relatively speaking, less dangerous now. As long as the powder lasted and the barrier of fire burned on, there was no fear of being overmastered. But what was to be done afterward, when both means of defense failed at once?

Glenarvan's heart swelled as he looked at Robert. He forgot himself in thinking of this poor child, as he saw him showing a courage so far above his years. Robert was pale, but he kept his gun steady, and stood with firm foot ready to meet the attacks of the infuriated wolves.

However, after Glenarvan had calmly surveyed the actual state of affairs, he determined to bring things to a crisis.

"In an hour's time," he said, "we shall neither have powder nor fire. It will never do to wait till then before we settle what to do."

Accordingly, he went up to Thalcave, and tried to talk to him by the help of the few Spanish words his memory could muster, though their conversation was often interrupted by one or the other having to fire a shot.

It was no easy task for the two men to understand each other, but, most fortunately, Glenarvan knew a great deal of the peculiarities of the red wolf; otherwise he could never have interpreted the Indian's words and gestures.

As it was, fully a quarter of an hour elapsed before he could get any answer from Thalcave to tell Robert in reply to his inquiry.

"What does he say?"

"He says that at any price we must hold out till daybreak. The AGUARA only prowls about at night, and goes back to his lair with the first streak of dawn. It is a cowardly beast, that loves the darkness and dreads the light--an owl on four feet."

"Very well, let us defend ourselves, then, till morning."

"Yes, my boy, and with knife-thrusts, when gun and shots fail."

Already Thalcave had set the example, for whenever a wolf came too near the burning pile, the long arm of the Patagonian dashed through the flames and came out again reddened with blood.

But very soon this means of defense would be at an end. About two o'clock, Thalcave flung his last armful of combustibles into the fire, and barely enough powder remained to load a gun five times.

Glenarvan threw a sorrowful glance round him. He thought of the lad standing there, and of his companions and those left behind, whom he loved so dearly.

Robert was silent. Perhaps the danger seemed less imminent to his imagination. But Glenarvan thought for him, and pictured to himself the horrible fate that seemed to await him inevitably. Quite overcome by his emotion, he took the child in his arms, and straining him convulsively to his heart, pressed his lips on his forehead, while tears he could not restrain streamed down his cheeks.

Robert looked up into his face with a smile, and said, "I am not frightened."

"No, my child, no! and you are right. In two hours daybreak will come, and we shall be saved. Bravo, Thalcave! my brave Patagonian! Bravo!"

he added as the Indian that moment leveled two enormous beasts who endeavored to leap across the barrier of flames.

But the fire was fast dying out, and the DENOUEMENT of the terrible drama was approaching. The flames got lower and lower. Once more the shadows of night fell on the prairie, and the glaring eyes of the wolves glowed like phosph.o.r.escent b.a.l.l.s in the darkness. A few minutes longer, and the whole pack would be in the inclosure.

Thalcave loaded his carbine for the last time, killed one more enormous monster, and then folded his arms. His head sank on his chest, and he appeared buried in deep thought. Was he planning some daring, impossible, mad attempt to repulse the infuriated horde? Glenarvan did not venture to ask.

At this very moment the wolves began to change their tactics. The deafening howls suddenly ceased: they seemed to be going away. Gloomy silence spread over the prairie, and made Robert exclaim:

"They're gone!"

But Thalcave, guessing his meaning, shook his head. He knew they would never relinquish their sure prey till daybreak made them hasten back to their dens.

Still, their plan of attack had evidently been altered. They no longer attempted to force the entrance, but their new maneuvers only heightened the danger.

They had gone round the RAMADA, as by common consent, and were trying to get in on the opposite side.

The next minute they heard their claws attacking the moldering wood, and already formidable paws and hungry, savage jaws had found their way through the palings. The terrified horses broke loose from their halters and ran about the inclosure, mad with fear.

Glenarvan put his arms round the young lad, and resolved to defend him as long as his life held out. Possibly he might have made a useless attempt at flight when his eye fell on Thalcave.

The Indian had been stalking about the RAMADA like a stag, when he suddenly stopped short, and going up to his horse, who was trembling with impatience, began to saddle him with the most scrupulous care, without forgetting a single strap or buckle. He seemed no longer to disturb himself in the least about the wolves outside, though their yells had redoubled in intensity. A dark suspicion crossed Glenarvan's mind as he watched him.

"He is going to desert us," he exclaimed at last, as he saw him seize the reins, as if preparing to mount.

"He! never!" replied Robert. Instead of deserting them, the truth was that the Indian was going to try and save his friends by sacrificing himself.

Thaouka was ready, and stood champing his bit. He reared up, and his splendid eyes flashed fire; he understood his master.

But just as the Patagonian caught hold of the horse's mane, Glenarvan seized his arm with a convulsive grip, and said, pointing to the open prairie.

"You are going away?"

"Yes," replied the Indian, understanding his gesture. Then he said a few words in Spanish, which meant: "_Thaouka; good horse; quick; will draw all the wolves away after him_."

"Oh, Thalcave," exclaimed Glenarvan.

"Quick, quick!" replied the Indian, while Glenarvan said, in a broken, agitated voice to Robert:

"Robert, my child, do you hear him? He wants to sacrifice himself for us. He wants to rush away over the Pampas, and turn off the wolves from us by attracting them to himself."

"Friend Thalcave," returned Robert, throwing himself at the feet of the Patagonian, "friend Thalcave, don't leave us!"

"No," said Glenarvan, "he shall not leave us."

And turning toward the Indian, he said, pointing to the frightened horses, "Let us go together."

"No," replied Thalcave, catching his meaning. "Bad beasts; frightened; Thaouka, good horse."

"Be it so then!" returned Glenarvan. "Thalcave will not leave you, Robert. He teaches me what I must do. It is for me to go, and for him to stay by you."

Then seizing Thaouka's bridle, he said, "I am going, Thalcave, not you."

"No," replied the Patagonian quietly.

"I am," exclaimed Glenarvan, s.n.a.t.c.hing the bridle out of his hands. "I, myself! Save this boy, Thalcave! I commit him to you."

Glenarvan was so excited that he mixed up English words with his Spanish. But what mattered the language at such a terrible moment. A gesture was enough. The two men understood each other.

However, Thalcave would not give in, and though every instant's delay but increased the danger, the discussion continued.

Neither Glenarvan nor Thalcave appeared inclined to yield. The Indian had dragged his companion towards the entrance of the RAMADA, and showed him the prairie, making him understand that now was the time when it was clear from the wolves; but that not a moment was to be lost, for should this maneuver not succeed, it would only render the situation of those left behind more desperate, and that he knew his horse well enough to be able to trust his wonderful lightness and swiftness to save them all. But Glenarvan was blind and obstinate, and determined to sacrifice himself at all hazards, when suddenly he felt himself violently pushed back. Thaouka pranced up, and reared himself bolt upright on his hind legs, and made a bound over the barrier of fire, while a clear, young voice called out:

"G.o.d save you, my lord."