"If it's too long we'll be wanting some of that grub which was washed away," asserted Diet. "In fact I dropped a sandwich half eaten."
"Same here," remarked his brother. "But let's hope that it will go down as suddenly as it came up."
That was all they could do—hope; but it bore fruits, for in about an hour, as they ascertained by glances at their watches, the flood was almost down to the normal channel of the underground stream.
"And if it will only stay there we can venture to keep on to the other end of the tunnel," spoke Bud.
"Will you do that?" Dick wanted to know.
"Why not?" asked Bud. "We want to see what happened, and where this water goes to when it disappears so suddenly; don't we?"
"Yes," agreed Dick. "But I thought, after our escape, that we had better head back for camp."
"It's about six of one and half a dozen of the other," asserted Bud. "We're almost half way through the tunnel, now, and we might as well keep on. I'd like to solve this mystery, and we can't if we call it off now."
"That's right," assented Nort. "We don't run any more danger going on to the river end of the tunnel than we would in going back to the camp end. That is unless we discover a big cavern, or hole through to China, in the other end of the tunnel. Even then we might be able to skirt around it."
"Let's go on!" suggested Bud, as he prepared to climb down off the ledge. "This thing has my goat!"