“I thought of that, too,” said Grant. “The trouble is that none of us know.”
“That might be an idea, though.”
“Yes,” admitted John, “but if we don’t know those things I don’t see how we can get very far.”
“Nor I,” said George. “We might try some experiments, though.”
“Go ahead,” urged Grant. “Try everything you can think of. We’ve nothing to lose and everything to gain. No matter how silly an idea may seem to you, try it. That’s the only way we can ever get anywhere.”
“Right you are, Grant!” exclaimed Fred. “That’s the way to talk. If we stick to it, I know we’ll find out all about it some day.”
“Perhaps we will ‘some day,’” said George mournfully.
CHAPTER XVII
UNDERGROUND WORK
One day John was standing at the back of the cave looking up through the opening which was there. Here it was that the billy goat had given him such a fright a few weeks before. This time, however, he did not see any “white bearded old man” as he gazed up into the aperture, but he did spy something almost equally interesting.