He glided away, after lighting two lanterns, by the gleams of which the adventurers could see that they were in a vaulted cavern that had evidently been fitted up as a living apartment. The sides, roof and floor were of stone. It was clean, and the air was fresh. There were some chairs, a table, and several cots, with pieces of bagging for bedding, though it was warm in the place.
“I guess we can stay here until we discover the secret,” spoke Tom.
“Bless my watch! We can if we have something to eat,” came from Mr. Damon, with something like a sigh. “I'm hungry!”
“And I want to make some observations,” said Mr. Parker. “From what I have seen of this mountain, I would not be surprised if this cave was to be suddenly destroyed by a landslide or a lightning bolt. I will make some further investigations.”
“Well, if it's going to cause you to make such gloomy prophecies as that, I'd just as soon you wouldn't look any further,” spoke Tom, in a low voice. But Mr. Parker, taking one of the lanterns, set about examining the rock of which the cave consisted.
In a short time Bill Renshaw returned with enough food to last for two days. He said he was going out on the mountain once more to act the part of a lookout, and would visit the adventurers again the next day.
“In the meanwhile you can do just as you please,” he said. “Nobody is likely to disturb you here, and you can sneak up and take a look at the men in the other cave whenever you're ready. Only be careful—that's all I've got to say. They're desperate men.”
It was not very pleasant, eating in the gloomy cavern, but they made the best of it. They cooked on a small oil-stove they found in the place, and after some hot coffee they felt much better.
“Well,” remarked Tom, after a while, “shall we take a chance, and go look at the men at work?”
“I think so,” answered Mr. Jenks. “The sooner we discover this mystery, the better. Then we can go back home.”