w," Frank counseled; "and let to-morrow look out for
itself."

"All right, I'll be with you in three shakes of a lamb's tail," declared
Bob.

But before he left the window Frank noticed that he thrust his head out,
as if desirous of making sure that no one could climb up the face of the
wall, and find entrance there while they slept.

Bob was not a timid boy as a rule; in fact he was deemed rather bold;
but just as he said, that dark face of Abajo had impressed him
unfavorably; and he felt that the young half-breed would be furious when
he learned how neatly he had been sold.

Nor did anything happen during that night as they slept upon the border
of the Wonderland. Both lads enjoyed a peaceful sleep, and awoke feeling
as "fresh as fish," as Bob quaintly expressed it.

Breakfast not being ready they walked about, viewing the astonishing
features of the canyon as seen from the bluff on which the hotel stood.
Down in the tremendous gap mists were curling up like little clouds, to
vanish as they reached the line where the sunlight fell. It was a sight
that appalled Bob, who declared that he felt as though looking into the
crater of some vast volcano.

"Well," remarked Frank, "they did have volcanos around here, after this
canyon was pretty well formed, though perhaps thousands of years ago.
Great beds of lava have been found down in the bottom of the hole, so my
little guide book tells me. But look away off there, Bob, and see that
peak standing up like the rim of a cloud. Do you know what that is?"

"I heard one man say," Bob replied, quickly, "Navajo Peak could be seen
on a clear morning, and perhaps that's the one; but Frank, just think,
it's about a hundred and twenty miles off. Whew! they do things on a big
scale around here; don't they? I'd call it the playground of giants."

"And you'd about hit the bulls eye," his chum observed; "but there goes
the call for breakfast."

"I feel as if I could stow away enough for a crowd, this mountain air is
so fresh and invigorating," Bob remarked, as they headed for the dining
room.

Half an hour later they were once more in front of the hotel, and
interviewing a guide who had been recommended by the manager as an
experienced canyon man. It ended in their making terms with John Henry,
as the fellow gave his name; though of course Frank was too wise to tell
him what their real object was in exploring the tremendous gap. That
could come later on.

At about nine o'cloc