roughing it long enough so that they had become really expert in the
work. And, besides, they had learned to get together a fairly
satisfying meal out of not much of anything. They had learned many
other things that were to prove useful to them in after years, but
which at the time was making little or no impression upon them.

Fairly radiating health and spirits, the boys threw themselves into
their saddles with a shout. The guide led the way, leading the mule
train, and his pace was so rapid that the pack animals were put to
their best to keep up with him. Most of the time he appeared to be
dragging the led mule, instead of leading it.

"A wonderful country," breathed the Professor, as they finally came
out on a high elevation that gave them a glimpse of the eastern slope
of the mountains.

They halted to take in the magnificent view.

"This is what is known as the 'Ozark Uplift,'" the Professor informed
them.

"I should call it a downfall," answered Ned, gazing off at the deep
gorges and jagged precipices. "Why do you call it that?"

The Professor waxed eloquent.

"From the earliest time, young gentlemen, this region has been subject
to uprising or downsinking. In all sections of its area it has
experienced the effects of powerful dynamic forces--"