ed the way across the table-land, at times moving far from the
border and then again approaching almost within sight of the great canyon.
The Canyon of Arizona extends for hundreds of miles, becoming vast and
wide in what is commonly known as the Grand Canyon. It winds through the
country at times visible and sometimes concealed from sight by intervening
cliffs or trees.

Before the noon-hour arrived the party halted, seeking the shelter of a
small cleft in the rim where they were able to start a fire and cook some
of the food they had brought with them.

The heat was so intense that Zeke commanded the expedition to wait until
late in the afternoon before the journey was resumed. Although neither
George nor Grant acknowledged that he was tired, both Go Ahead Boys were
entirely willing to heed the advice that was given them.

Late in the afternoon the three explorers again resumed their journey. A
brief halt for supper was made, but soon afterward the boys once more were
following Zeke as he led the way in the moonlight. The air was cool now
and although the altitude was still high the boys found less difficulty in
breathing.

In a sheltered spot well known to Zeke a camp was pitched for the night
and soon after they had cast themselves upon their blankets all three were
soundly sleeping.

It was long before sunrise when Zeke's stentorian call summoned the boys
to the task of the coming day. It was with some difficulty that both young
prospectors responded. As soon, however, as breakfast had been prepared
and eaten, although it was still an hour before sunrise, they started once
more on their journey to Thorn's Gulch.

Steadily, monotonously they kept on their way, walking in single file and
in the same way which had been observed the preceding day.

It was not long after sunrise when Zeke suddenly jumped to one side
shouting to the boys as he did so to keep away.

Before either of them was aware of any peril Zeke drew his revolver and
fired several shots at an object in front of him, which as yet was unseen
by the boys.

"There!" shouted Zeke. "I guess that'll get you, you rascally varmint!" As
he spoke he seized his long knife and hurled it savagely. "How do you like
that?" he shouted, "I guess you won't do any more harm to anybody."

The curiosity of George and Grant had been so thoroughly aroused by the
strange calls and actions of their guide that in spite of his warning both
crept forward to see what had