In a few moments the sheriff had each of the five men in handcuffs, and without having had to fire a shot. Tad, who had rushed out, followed by his companions, explained to the posse that the Professor and Jose were missing. He believed now that they were prisoners in the cave.

And there they found them—Professor Zepplin, Ben Tackers and Jose,
bound hand and foot.

All of them bad been taken captive by the mountaineers when they visited the cave the night before.

Ab Durkin was fuming with rage.

"These cayuses was stealin' my claim," he snarled. "Understand me, they was stealin' the gold, and, when I tried to drive them off, they sailed into us——"

"Yes, I observed that you were shooting at three boys," retorted the sheriff, sarcastically.

"See, thar's my mark over that hole in the ground," continued Ab pointing to the sign that was flapping idly in the breeze. "That's my claim and no man ain't goin' ter take it away from me, neither."

"My friend," retorted Professor Zepplin, stepping forward frowning. "If I did what you deserve, I should send a bullet into your miserable carcass. Instead I'm going to tell you about a little paper I have here."

All eyes instantly were centered on the Professor.

"This little document, gentlemen, is a certificate from the register's office at Denver, stating that the Lost Claim, which lies just within this cave here, is the property of Herman von Zepplin. Had you examined this neighborhood more closely you would have found my claim stakes driven, as required by law. With the certificate is a report on the assay of the samples of ore I sent them, showing that, while the mine is a valuable property, it does not contain such untold wealth as generally has been believed. However, it may give these boys a few thousands apiece."