Chapter XI: The Rush of Waters

Echoes of the footsteps of the boy ranchers sounded and resounded as they tramped along the now dry water-course of what had, only a day before, been a life-giving stream of water. The rocky and roughly-vaulted roof overhead gave back the noises like the soundbox of a phonograph, and the lads had to speak loudly, in places, to make their voices carry above the echoes. These places were spots where the vaulted roof of the tunnel was higher than usual.

They had walked on, the semi-circular spot of light at the entrance near the black pipe growing more and more faint, until it was not at all visible.

"There she goes!" exclaimed Dick, looking back.

"What?" asked his brother.

"The last gleam of daylight," was the answer. "If anything happens to our lanterns, so that they go out, and we get mixed up in some branch passages--good night! That's all I have to say!" and Dick was very emphatic in this.

"By Zip Foster!" exclaimed Bud, using that expression for the first time in several days. "You're a cheerful chap to have along on a picnic like this, Dick! Not!"

"Well, might as well prepare for the worst and hope for the best," laughed Dick, while Nort inquired:

"Why don't you tell us more about Zip Foster?"

"Oh--you--say, did you hear anything then?" asked Bud, and his voice had in it such a note of anxiety that his companions did not, at the time, imagine he might have been putting them off from a much-wanted and often-delayed explanation of this mysterious Zip Foster personage.

"Hear what!" asked Dick.

"Something like water running," replied Bud. "I have a notion that our stream--I call it ours for it doesn't seem to belong to anyone else--our stream may just trickle off, now and then, into some other underground course."

"Maybe it does," agreed Dick. "But I don't hear any water running."

"Nor I," added his brother.

"Maybe I was mistaken," Bud admitted. "But I sure would like to come across that missing water of mine!"

He little realized, nor did the others, what fruit his wish was to bear, and that very shortly.

"I guess what you heard was the echoes," spoke Dick. "I never heard so many queer noises."

"It's like the cave of the winds," murmured Nort. "But it's a great adventure all the same, Bud! I mean it would be great if we didn't have to worry about the water not coming back," he made haste to add, for he realized what it would mean to their new ranch in Flume Valley if no drink could be had for the cattle.

"It beats the finding of the Triceratops all to slathers!" exclaimed Dick, "and that was no slouch of a happening, either."

"Yes, no telling what's ahead of us," spoke Bud, as he walked along, unsteadily enough for the way was rough and filled with stones. And, as the boys tramped along in the tunnel, part of the time in the very bed of the stream that had gone dry, their lanterns cast fantastic shadows on the rocky walls. I have said that the stream was dry, but this was not strictly true, for in places, where the uneven bed formed depressions, there were pools of water. And, in some places, there were even little rills trickling along. But they never would reach the iron pipe that discharged into the reservoir.

On and on tramped the boys, pausing, now and then, to hold up their lanterns and inspect the rocky walls of the underground tunnel which echoed so strangely to their footsteps, and through which swept strange, cold and clammy winds.

"Well, I reckon we'll have to go all the way to the end before we discover anything, if we do find it," said Bud, when they had walked on for over an hour. Their pace was slow because of the uneven footing.

"And when we get to the other end and find the water running into the pipe at the dam in Pocut River, what then?" asked Nort.

"We'll hardly find that, I think," said Bud. "Or, I mean, we won't have to go all the way to the other end if the water is found running there."

"Why not?" asked Dick.

"Because, if the water's running in from the dam end of the pipe, we'll meet the stream before we get all the way through the tunnel," Bud explained. "I meant to call up on the telephone and find out if everything was all right at the river end before we started out, but I forgot. My theory is that the stream gets into this tunnel from the river all right, but is shunted off before it reaches us," he added.

"How shunted?" Dick wanted to know.

"That's what I can't tell," spoke Bud. "But why try to puzzle this out until we get something better to work on? I'm hungry! What do you say that we eat?"

"Suits me," agreed Nort.

"I'm not going to vote in the negative," asserted Dick.

They judged that they were about a quarter way through the mysterious tunnel now, and, setting down the lanterns on the rocky floor, the boy ranchers took out the food they had brought with them. It would be risky to kindle a fire in that enclosed place, Bud decided, as the smoke might choke them, though so far they had found an abundance of fresh air, a current blowing part of the time in their faces, and part of the time in the opposite direction. This proved that there was a good draft in the elongated cave, but it was voted best not to take any chances, though there was plenty of dried driftwood on the tunnel floor, and this could have been used for a blaze.

But the boys sat about in the gleam of their lanterns, and, while they ate the sandwiches they had brought, they talked of the strange happenings that had led up to this venture in which they were now joined.

Suddenly Bud, who had just taken up a piece of fruit cake, part of a chunk that his pretty sister Nell had sent over from the main ranch house a day or so before, stopped chewing in order to listen better; for, as you doubtless know, the action of the jaws precludes keen attention to outside sounds.

"What's the matter?" asked Dick, noting his cousin's act.

"I heard something," Bud answered.

"I'm hearing things all the while!" declared Dick. "This is the most weird place for mysterious noises I ever struck!"

"But this is different," insisted Bud. "Listen!"

Nort and Dick stopped chewing and strained their ears to catch the sound that had attracted Bud's attention. A strange, rushing, whispering echo seemed to fill the tunnel.

"Doesn't that sound like rushing water?" asked Bud.

"Yes," agreed Dick, after a moment of intentness; "it does."

"Look out!" quickly yelled Nort. "It _is_ water, and on the rush, too! Jump for your lives! It's a flood!" and making a grab for one of the lanterns, that they might not be left in total blackness, he sprang toward the rocky side of the tunnel, an example followed by his companions.

And the rush of waters filled the underground cave with a mighty, roaring sound.