The night was well advanced when two sharp reports from the south told the searchers that some of their party had gained tidings of the absent ones.

Each man wheeled sharply about and raced for the camp as rapidly as the rough trail would permit, arriving there about the time their leader rode in with Walter Perkins. He had found the lad less than half a mile from camp. Beyond being very badly frightened, Walter seemed none the worse for his experience. Instead of having followed the direction in which he had started, Walter had gradually worn around to the north until finally he was headed back toward their original starting point.

In a short time he realized that he was lost. He called loudly for help, but as there was no one to hear his cries, he had at last thrown himself down on the ground in despair to wait for morning.

It was there that the leader of the rescue party had stumbled upon him, Walter having heard and answered his hail.

"That's one. Spread out again, boys. We'll rope the rest of the youngsters before morning. They can't be far away. The Professor, as they call him, has a horse, and there's no telling where he is by this time."

But the task they had set for themselves this time, was not quite so easy of accomplishment.

CHAPTER XV

THE ROUND UP

Some miles from the camp the searchers next morning came upon an abandoned camp where there had been a fire and where, from the bones found there, they decided some one had eaten a rabbit.

"We're on the trail," said the leader. "We'll get him yet."