“I wonder what sort of a place I’ve gotten into,” thought Fenn. “Maybe it’s—yes, I’ll bet that’s what it is—a gold mine!”

For a moment the thought of this made his heart beat strangely fast. Then cooler reason came to him, and he recalled that the region around Lake Superior contained no gold, though there were mines of other minerals, some quite valuable.

This train of thought was interrupted by the sudden stopping of the man who was carrying him, as though he was a baby. The fellow stooped down, kicked a door open with his foot, and, the next moment Fenn found himself in a small cave, lighted by a lantern hanging over a rough table, around which several chairs were drawn.

“Here’s where you stay until the boss tells you to come out,” fairly growled the man.

Fenn did not reply, and the fellow withdrew, taking care, as the lad noted, to lock the door after him. No sooner was the portal closed, than Fenn began an inspection of the place. He took the lantern and held it close to the door. It was made of heavy planks, and the fastening seemed to be on the outside. As for the remainder of the cave, the walls were composed of hard clay, or harder rock. The place was a sort of niche, hollowed out from the larger cavern.

“Well, I seem to be in a pickle,” observed Fenn grimly. “That comes of prying too much into other people’s affairs, I s’pose. No help for it, however. I’m here and the next question is how to get away. I wish the boys were with me—no, I don’t either. It’s bad enough to be here myself, without getting them into trouble.

“I guess they’ll be surprised when they get back to camp and find me gone. I wish I’d left some sort of a message. They won’t know where to look for me.”

But Fenn did not give his chums credit for their energy. The prisoner made a circuit of his dungeon, and concluded there was no way, at present, of getting out. He readily got rid of the rope that fastened his arms behind him.

“I will just take another look at that door,” mused Fenn, when, having completed his tour of inspection, which did not take him long, he again found himself in front of the portal. He held the lantern up as high as he could. “If I stood on a chair I could see better,” he reasoned. He got one of the rough pieces of furniture, mounted it, and, was just raising the light up to the top of the door when his hand slipped and the lantern fell, smashing the glass, and extinguishing the wick.

“Hu!” exclaimed Fenn, standing on the chair in the darkness. “Lucky it didn’t explode and set fire to the oil. I’d been worse off then I am now.”