As Frank and his party left the mountain side there remained two men buried alive in the cave whose mouth was closed by the landslide!

"Where are you, Del Norte?" cried one of the imprisoned men, in a gasping, frightened voice when the roar and rumble of the landslide had ceased, and they began to realize their terrible position.

"I am here," answered the other. "What can we do, Ridgeway?"

"Do? Why, we can die like dogs! There is nothing else for it. You're sure there is no other way out of this cave?"

"No other way. Perhaps we can dig out."

"Not in a thousand years! What have we to dig with—our bare hands?"

"I have my knife—the knife with which I was going to cut out the tongue of that cursed gringo, Merriwell! Why didn't I do it?"

"You know why. Red Ben went back on us, may the fiends take the redskin cur! He helped Merriwell get away with the girl. When Sears tried to follow the Indian shot him, and he's buried out there somewhere beneath that landslide. But he's better off than we are, for he is dead, and we must die! I can't die, Del Norte! I'm not ready to die! I'm not fit to die!"

Then the poor wretch began to weep and pray in the utmost anguish of soul.

Del Norte seemed cowed. He had burned many matches in order that by their faint glow he might examine the great mass of earth and stone that was piled on and crushed into the place that had once been the entrance to the cave. He had seen that a mighty bowlder was blocking the greater part of the former entrance. That stone alone would be enough to imprison them hopelessly, but the sounds of the landslide which had made the mountain roar and shake had satisfied him that the bowlder was held in place by a mass of earth and timber through which, with the best implements, it would be impossible to dig in a week.

"Merriwell has triumphed!" muttered the Mexican. "He will have no more trouble from me."

"Fiends take you!" snarled Ridgeway. "Why did you ever cross my path, and tempt me to such a death with your money? For the love of Heaven, light another match!"

"I have but three more."

"Can't you find a brand from the fire? Let's have some light! We had torches. Where are they?"

"They were extinguished by the rush of air when the slide took place. I've tried to find them, but failed. I'll try again."

"I'm going mad—mad!" groaned Ridgeway.

Del Norte began to search for the extinguished torches. After a time, during which his companion wept, prayed, and cursed by turns, he discovered one of them.

Then he carefully struck one of his matches. The extinguished torch was a piece of resinous pine, and it burned up quickly, giving a flaring light and sending up a wavering stream of black smoke.

By the light the two men gazed into each other's ghastly faces. Their eyes were distended with horror. Their mouths were dry and their lips drawn back from their gleaming teeth. They looked like beasts.

"Curse you, Porfias del Norte!" snarled Ridgeway. "It was you who brought me to this!"

"Bah! It was your greed for the money I paid you that brought you here."

"Had I not met you——"

"You might have been hanged for some crime. Dying this way will save you from hanging."

"Don't talk of hanging!" panted Ridgeway. "If ever a man deserved it you are that man!"

"But I was not born to be hanged."

"Better that than this kind of a death! At least, you would be out in the open air, with a chance to breathe. I am stifling! I feel these walls crowding in upon me! They are going to crush me! Keep them off! keep them off!"

The wretch flung himself on the ground and writhed with agony and fear.

With the torch in his shaking hands, Del Norte stepped forward and kicked his abject and fear-tortured companion.

"Get up, here!" he snarled. "We will take one more look. We will see once more if there is any chance of escape."

Although Ridgeway declared there was no hope, he got up. With the Mexican leading, they passed back into the cave, being forced several times to bend low in a crouching position to avoid striking their heads against the rocky roof.

There were three chambers and only one straight passage from chamber to chamber. It was a simple matter to explore the entire cave. When they came at last into the third chamber they soon found themselves at the end of it, with the dank wall of stone before them.

For some moments they stood quite still, staring helplessly at this wall.

Suddenly a shriek burst from the lips of Ridgeway.

"Doomed!" he cried. "No escape! I feel the mountain collapsing! The walls are crowding in upon us! It's the end! Oh, for just one more breath of free air! For just one more sight of the world outside!"

With that cry, he dropped flat on his face and lay still, as if death had come to claim him, also.

"Get up!" harshly ordered Del Norte, again kicking the man. "Get up, or I'll leave you here alone. I am going back."

Why he desired to return to what had once been the mouth of the cave he could not tell, for there he would be no nearer liberty than in his present position.

The smoke from the torch was filling the place and making the air foul.

"We'll smother in a little while!" thought the Mexican. "It's a wonder we have not smothered already."

Again he kicked his companion and called for him to rise.

Ridgeway lifted his head and stared with terrible eyes at his comrade in misery.

"Did you have a mother?" he asked.

"Of course I did!"

"Did you promise her you would be good?"

Del Norte swore in Spanish.

"I'll not stay here a minute longer!" he declared. "If you stay, you'll remain in the dark."

"Hold on!" commanded Ridgeway, lifting himself on one hand and stretching the other out to the Mexican. "Don't you dare leave me! You're the man who brought this on me! Some one fired a bullet through your head, but it did not kill you. I wish it had! You thought you bore a charmed life; you thought nothing could kill you. Lead failed to do it, but God sent the landslide, and you are as good as dead. Ha! ha! ha!"

Del Norte started away.

"Stand where you are!" yelled Ridgeway, leaping up with amazing quickness. "You were not killed by the bullet, and now, for all of the landslide, you still live. You're a fiend, and you ought to die! I am commanded to kill you! I must do it!"

The Mexican did not dare turn his back on the raving man. Again he started away, but this time he moved backward, keeping his eyes on Ridgeway, who came creeping after him, crouching a little and seeming ready to spring.

Suddenly Ridgeway leaped. His arms shot out and his fingers closed on Del Norte's neck.

"I must kill you!" he yelled. "I am the one chosen to do it! Your time has come!"

The torch fell to the floor and lay there, spluttering and flaring. By this dim and flickering light a fearful struggle took place.

Ridgeway had obtained a powerful clasp on Del Norte's throat, and the Mexican could not hurl him off. They staggered against the wall, which seemed to fling them off. They swayed from side to side, once staggering over the spot where the torch lay.

Then the Mexican succeeded at last in drawing something from his bosom. It flashed brightly in the dim torchlight as he struck with it. There was the impact of a muffled blow, and Ridgeway gave a great start, seeming to grow suddenly straight and tall.

Again the Mexican struck, but now, instead of growing straighter, the other man seemed suddenly to collapse. His breath escaped from his lips in a husky groan, and he dropped in a sprawling heap on the ground at Del Norte's feet.

The man who remained erect backed off a little, staring at the other.

"I had to do it!" whispered Del Norte. "The fool drove me to it! He was mad! He had me by the throat, and he would have killed me! I had to do it!"

Over and over he kept repeating those words:

"I had to do it!"

He felt himself shaking from his head to his feet. On his forehead were great, cold beads of perspiration. His heart seemed choking him.

The man on the ground moved and groaned.

"I had to do it!" whispered Del Norte.

The torch was going out. The man on the ground lay stretched squarely across the floor of the cave, which was not more than eight feet wide at that point. In order to reach the torch it would be absolutely necessary to step over him.

Del Norte started and then stopped. His teeth were chattering, and his cheeks were fully as pale as those of the poor wretch at his feet.

The torch burned dimmer.

At last the Mexican summoned all his courage and stepped over the body, catching up the torch. He swung it until it blazed up brightly.

"I'm sorry," he muttered. "I'm sorry, Ridgeway; but you forced me!"

He stepped back over the body and turned with the torch in his hand to take a last look. The eyes of the stricken man were staring straight up at the rocky ceiling, and there was on his face a strangely altered expression, at which Del Norte wondered. In truth, his look was one of peace and happiness, and he smiled a little. His lips moved, and faintly he whispered:

"Mother—it is—your boy—Jack!"

Then those lips were hushed forever.