"Easily enough; the whole cave was but a shell. The earth had been washed from around the rocks, and they were resting one on the other. When one fell, they all fell."

"What you say seems to be true," assented Owen.

"And now I wonder whether the whole cave has fallen in?" inquired Martin.

"Has Jerry's 'hold out' been blown up? That's the first question to answer," said Owen.

"Come," said Martin. "Let us see if we can find the little window."

It was the fourth day after the capture of old Bowen. Martin and Owen had come down to examine the scene of the explosion, and to search for the money which was supposed to be in Jerry's abode; for Mr. Lane had told them of the conversation which he had overheard between Simpson and the Tinker. In fact, the sheriff had promised to accompany them, but had been detained by business connected with his office. If they found the money, the two boys intended to send it on to the old trapper, who had always been friendly to them, and whose misfortune they both lamented.

It was impossible to judge of the position of the "hold out" from the top of the ridge where the boys were standing, so they descended into the ravine to the left of the hill to look for the small glass window. With the exact description which Mr. Lane had given, they did not anticipate any great trouble, yet so ingeniously had Jerry concealed the opening, that they spent an hour without discovering it, although they passed below it many times.

Finally Martin suggested that one of them climb a tree near the cliff. He had scarcely finished the sentence before Owen, springing up to the lower branches of a young ash tree, mounted to the top as nimbly as a squirrel, and a moment later a shout of triumph announced to Martin that the window had been found.

"Can we get up to it?" asked Martin.

"It is best to get down to it," came the reply from the top of the tree. "How long are the ropes which we used to tie our horses."