er the rock
rises up almost from its very flood. When the water is high it must
sweep along against the face of that big cliff. And Bob, something seems
to tell me that somewhere inside of a mile or so, we're going to find
what we're looking for."

"Oh! I hope so!" echoed Bob, with a look of expectancy on his face; for
he always put great reliance on the common sense of his chum; and when
Frank said a thing in that steady tone, the Kentucky boy believed it
must be so.

Frank called a halt then and there.

"We're tired, anyway," he said, "and might as well spend the night here.
Besides, I just want to find a place were I can take a good look through
the glass up at that cliff near the top. It faces the West, all right,
you see; and the indications are that somewhere or other I'll find
signs of the queer windows belonging to some of those cave houses."

The camp was made, and Charley Moi busied himself with his fire. Bob had
some things he wished to attend to; while Frank took the glass, and,
settling down in a place where he believed he could get a fair view of
the upper strata of colored rock, began carefully scrutinizing the
cliff.

"The time is right, because the old Indian said the Westering sun shone
in the mouth of Echo Cave," Frank mused, as he pursued his work, not
disappointed because failure came in the beginning.

Frank had been at work possibly six or eight minutes when he gave
utterance to a low exclamation. Then he fixed his field glasses upon a
certain spot as though something had caught his attention there.

"Bob!" he called out.

"Want me?" asked his chum from the spot where the fire was burning.

"Yes, come here please," Frank continued.

Bob quickly complied with the request. He knew that although his
camp-mate spoke in such a quiet tone, he had evidently made a discovery.
Frank could repress his feelings even in a moment of great excitement,
which was something beyond the ability of the more impetuous Kentucky
lad.

"What have you found, Frank?" he asked, as he reached the side of the
other.

"Here, take the glass," said Frank. "Point it toward that little cone
that seems to rise up like a chimney above the level of the cliff top.
Got it now? Well, let your glass slowly drop straight down the face of
the rock. Never mind the glint of the sun, and the fine rich color. I
know it's just glorious, and all that; but we're after something more
important now than pictures and color effects. W