"I think we shall find quite enough here on the edge of the rim to
occupy our minds for the rest of the day, Nance," returned the Professor.

The boys agreed to this. They did not feel as if they ever would want
to leave the view that fascinated and held them so enthralled. That day
they journeyed over to the hotel for dinner. The guests at the quaint
hotel were much interested in the Pony Rider Boys, and late in the
afternoon quite a crowd came over to visit Camp Grand, as the lads had
named their camp after the pack train had arrived and the tents were
pitched.

There were four tents all pitched in a row facing the Canyon, the tents
in a straight line. In front the American flag was planted, the camp
fire burning about midway of the line and in front, so that at night
it would light up the entire company street.

They cooked their own supper, Tad attending to this. But the boys were
too full of the wonderful things they had seen that day to feel their
usual keen-edged appetite.

The dishes put away, the Professor having become deeply absorbed in an
argument with some gentlemen from the hotel regarding the "processes
of deposition and subsidence of the uplift," Tad slipped away, leaving
his chums listening to the conversation. Dad was also listening in
open-mouthed wonder that any human being could use such long words as
were being passed back and forth without choking to death. He was,
however, so absorbed in the conversation that he did not at the moment
note Butler's departure. Tad passed out of sight in the direction of
the Canyon.