"Well," began Bud, "we've got to get to the bottom of this, and
if we don't in one way we will----"

He was interrupted by a shout from Dick.

"Look!" cried the stout lad. "There's a fire! The grass is on
fire, Bud!"

The western lad gave a quick look in the direction Dick
indicated. It was off to the right from the trail they had been
following.

"It is a fire--regular prairie fire," Bud murmured.

"Could any of the reservation Indians be on the rampage and have
set it?" asked Nort.

"I don't know! We've got to find out about it!" shouted Bud.
"Come on, fellows!" And, wheeling his horse, he abandoned the
trail of the rustlers, and galloped toward the fire, followed by
Nort and Dick.




CHAPTER X

SERIOUS QUESTIONS