Along the corridor he crept until, turning a corner, he found himself in a large domed cavern that was empty and deserted. Here also was a dim light that permitted him to see another corridor at the opposite side; so he crossed the rocky floor of the cavern and entered a second corridor. This one twisted and turned in every direction but was not very long, so soon the boy reached a second cavern, not so large as the first. This he found vacant also, but it had another corridor leading out of it, so Inga entered that. It was straight and short and beyond was a third cavern, which differed little from the others except that it had a strong iron grating at one side of it.

All three of these caverns had been roughly hewn from the rock and it seemed they had never been put to use, as had all the other caverns of the nomes he had visited. Standing in the third cavern, Inga saw what he thought was still another corridor at its farther side, so he walked toward it. This opening was dark, and that fact, and the solemn silence all around him, made him hesitate for a while to enter it. Upon reflection, however, he realized that unless he explored the place to the very end he could not hope to escape from it, so he boldly entered the dark corridor and felt his way cautiously as he moved forward.

Scarcely had he taken two paces when a crash resounded back of him and a heavy sheet of steel closed the opening into the cavern from which he had just come. He paused a moment, but it still seemed best to proceed, and as Inga advanced in the dark, holding his hands outstretched before him to feel his way, handcuffs fell upon his wrists and locked themselves with a sharp click, and an instant later he found he was chained to a stout iron post set firmly in the rock floor.

The chains were long enough to permit him to move a yard or so in any direction and by feeling the walls he found he was in a small circular room that had no outlet except the passage by which he had entered, and that was now closed by the door of steel. This was the end of the series of caverns and corridors.

It was now that the horror of his situation occurred to the boy with full force. But he resolved not to submit to his fate without a struggle, and realizing that he possessed the Blue Pearl, which gave him marvelous strength, he quickly broke the chains and set himself free of the handcuffs. Next he twisted the steel door from its hinges, and creeping along the short passage, found himself in the third cave.

But now the dim light, which had before guided him, had vanished; yet on peering into the gloom of the cave he saw what appeared to be two round disks of flame, which cast a subdued glow over the floor and walls. By this dull glow he made out the form of an enormous man, seated in the center of the cave, and he saw that the iron grating had been removed, permitting the man to enter.

The giant was unclothed and its limbs were thickly covered with coarse red hair. The round disks of flame were its two eyes and when it opened its mouth to yawn Inga saw that its jaws were wide enough to crush a dozen men between the great rows of teeth.

Presently the giant looked up and perceived the boy crouching at the other side of the cavern, so he called out in a hoarse, rude voice:

"Come hither, my pretty one. We will wrestle together, you and I, and if you succeed in throwing me I will let you pass through my cave."

The boy made no reply to the challenge. He realized he was in dire peril and regretted that he had lent the Pink Pearl to King Rinkitink. But it was now too late for vain regrets, although he feared that even his great strength would avail him little against this hairy monster. For his arms were not long enough to span a fourth of the giant's huge body, while the monster's powerful limbs would be likely to crush out Inga's life before he could gain the mastery.

Therefore the Prince resolved to employ other means to combat this foe, who had doubtless been placed there to bar his return. Retreating through the passage he reached the room where he had been chained and wrenched the iron post from its socket. It was a foot thick and four feet long, and being of solid iron was so heavy that three ordinary men would have found it hard to lift.

Returning to the cavern, the boy swung the great bar above his head and dashed it with mighty force full at the giant. The end of the bar struck the monster upon its forehead, and with a single groan it fell full length upon the floor and lay still.

When the giant fell, the glow from its eyes faded away, and all was dark. Cautiously, for Inga was not sure the giant was dead, the boy felt his way toward the opening that led to the middle cavern. The entrance was narrow and the darkness was intense, but, feeling braver now, the boy stepped boldly forward. Instantly the floor began to sink beneath him and in great alarm he turned and made a leap that enabled him to grasp the rocky sides of the wall and regain a footing in the passage through which he had just come.

Scarcely had he obtained this place of refuge when a mighty crash resounded throughout the cavern and the sound of a rushing torrent came from far below. Inga felt in his pocket and found several matches, one of which he lighted and held before him. While it flickered he saw that the entire floor of the cavern had fallen away, and knew that had he not instantly regained his footing in the passage he would have plunged into the abyss that lay beneath him.

By the light of another match he saw the opening at the other side of the cave and the thought came to him that possibly he might leap across the gulf. Of course, this could never be accomplished without the marvelous strength lent him by the Blue Pearl, but Inga had the feeling that one powerful spring might carry him over the chasm into safety. He could not stay where he was, that was certain, so he resolved to make the attempt.

He took a long run through the first cave and the short corridor; then, exerting all his strength, he launched himself over the black gulf of the second cave. Swiftly he flew and, although his heart stood still with fear, only a few seconds elapsed before his feet touched the ledge of the opposite passageway and he knew he had safely accomplished the wonderful feat.

Only pausing to draw one long breath of relief, Inga quickly traversed the crooked corridor that led to the last cavern of the three. But when he came in sight of it he paused abruptly, his eyes nearly blinded by a glare of strong light which burst upon them. Covering his face with his hands, Inga retreated behind a projecting corner of rock and by gradually getting his eyes used to the light he was finally able to gaze without blinking upon the strange glare that had so quickly changed the condition of the cavern. When he had passed through this vault it had been entirely empty. Now the flat floor of rock was covered everywhere with a bed of glowing coals, which shot up little tongues of red and white flames. Indeed, the entire cave was one monster furnace and the heat that came from it was fearful.

Inga's heart sank within him as he realized the terrible obstacle placed by the cunning Nome King between him and the safety of the other caverns. There was no turning back, for it would be impossible for him again to leap over the gulf of the second cave, the corridor at this side being so crooked that he could get no run before he jumped. Neither could he leap over the glowing coals of the cavern that faced him, for it was much larger than the middle cavern. In this dilemma he feared his great strength would avail him nothing and he bitterly reproached himself for parting with the Pink Pearl, which would have preserved him from injury.

However, it was not in the nature of Prince Inga to despair for long, his past adventures having taught him confidence and courage, sharpened his wits and given him the genius of invention. He sat down and thought earnestly on the means of escape from his danger and at last a clever idea came to his mind. This is the way to get ideas: never to let adverse circumstances discourage you, but to believe there is a way out of every difficulty, which may be found by earnest thought.