Part 1 (2/2)

It will also be remembered that Tad was able to rescue another lad who, like himself, had been taken by the Blackfeet, and to return the boy to his father, none the worse for his exciting experiences. It will be recalled as well, how Tad Butler through his own efforts solved the mystery of the old Custer trail--a mystery that had perplexed and annoyed the ranchers along the historic trail for many months.

And now they were once more in the saddle, having chosen the Ozark Mountains in southwestern Missouri as the scene of their next explorations.

With them they carried a pack train of four mules, these being best adapted to packing the boys' belongings over the rugged mountains.

For their guide they had engaged a full-blooded Shawnee Indian named Joe Hawk, known among his people as Eagle-eye, making a party of six, with eight head of stock in all.

At the time of the beginning of this narrative the Pony Riders were encamped on a fork of the White River some three days out from Springfield. Joe Hawk had asked permission to leave the party for the night to pay a visit to a fellow-tribesman who lived somewhere in the mountains to the west of them.

On second thought it occurred to Professor Zepplin that perhaps it might have been Joe, or Eagle-eye, as the boys had decided to call the Indian, whom he had heard skulking about the camp.

”Eagle-eye,” he called softly.

There was no response, so the Professor, gripping his gun resolutely, crept along toward the opposite side of the camp where the noise had seemed to come from. So quietly had he moved that he made scarcely a sound, until suddenly there came a commotion that more than made up for the noise he had so successfully avoided before.

Stacy Brown, with his usual forgetfulness, had left his saddle in the middle of the camp. The Professor caught his toe on the obstruction, measuring his length on the ground instantly, where he floundered about for a few seconds.

”Instead of discovering the other fellow, I think I am discovering myself,” he growled, scrambling to his feet, gingerly rubbing a knee.

Now the Professor walked with a distinct limp, while his bare feet seemed to pick up every sharp pebble in camp, all of which added to his discomfort.

”I'd make a nice sort of scout,” he muttered. ”Everybody within a mile of me would know I was coming even before I got started, I guess--”

The Professor suddenly cut short his words, and crouched down close to the ground. He thought he heard something ahead and a little to the right of him.

”Who's there?” he demanded.

No answer being made to his inquiry, he gripped his gun more firmly and crawled cautiously toward the spot where he thought he had heard some one moving. The night was so dark that he could make nothing out of the shadows about him, being obliged therefore to trust entirely to his sense of hearing.

Now he was certain that some one was in camp who had no business there, for the sound of footsteps was plainly borne to his ears--cautious, catlike steps, as if the intruder were seeking to get away without attracting attention.

The Professor, determined to capture the intruder, getting down on all fours to avoid possible detection, made a wide detour so as to come up behind where the fellow seemed to be at that moment. After much labor he managed to reach the desired position.

The Professor straightened up to listen. He must be close upon the other by this time. But what was his chagrin to hear those same footsteps on the opposite side of the camp. Professor Zepplin by much effort had just come from the other side himself.

”Stupid!” he muttered. ”I'll take no roundabout way this time. I'll go straight ahead and be as quiet about it as I can.”

He did so. He moved straight across the camp ground, not forgetting the saddle which he carefully avoided, but narrowly missing falling over it a second time.

By the time he had crossed to his former position, the intruder had done likewise. Professor Zepplin dodged behind a tree.

By this time the scientist was beginning to feel a little worried. He could not understand what the other fellow's object might be. If it were robbery, the fellow certainly would desire to get away as quickly as possible, rather than remain when he knew that efforts were being made to capture him. If not plunder, what could be his purpose?

With suddenly formed determination, Professor Zepplin strode out from his hiding place, starting for the other side on a run.

The other man did the same, and the only result of the move was that their positions were exchanged.

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