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.