The Cave
153
voice was shaky, for he had a suspicion of what had actually happened.
"It seemed mighty close."
"That's what I'm afraid of. It may have blocked up this tunnel."
Hastily, the boys went forward. In a few moments the flashlight revealed a sight at which their hearts sank.
The passage before them was completely closed up!
Great boulders, ledges of rock, and a heavy downpouring of earth formed an apparently impenetrable barrier ahead. A loose stone, no doubt dislodged when they went by a short time before, had given way and had brought down this miniature avalanche from the roof and sides of the tunnel.
"We're trapped!" Frank exclaimed.
