But Harry had come forth to seek after this very thing, namely, some mysterious opening into a side-passage, and after the first surprise it occurred to him that this might be what he wished to find. And now the fact of the stone jutting forth became intelligible, though this new explanation promised ill for the safety of the package. It was evident that this stone was movable, and afforded in some way an entrance to this passage. It seemed strange that so vast a stone should be movable, yet there was the fact. Perhaps also it was less massive than it seemed. Perhaps it was a mere slab and opened like a door. But how?

He now examined its surface with the most careful and minute scrutiny. In vain. Over all the surface and over all the edges there was nothing that indicated any means by which such a stone could be moved—nothing of the nature of hinges, and nothing of the nature of a handle, by which to grasp it so as to move it. Yet it was movable, and had been moved lately. Perhaps it could be moved without any help from a handle.

He now thrust his arm through, and, grasping it, pulled at it with all his strength. His utmost effort, however, made no impression. He found that the stone was massive within as without, that it was no thin slab, but one which his arm could not surround—at least eighteen inches in solid thickness where his arm held it. Yet the stone did move, and had been moved. The matter became now more incomprehensible than ever. It could be moved. It had been moved, yet there was a secret contrivance here into which he could not penetrate.

Again the thought came to him of the package which contained Katie's fortune. Some one had been here. Had that one found the package? It must be so. Fool that he was!

A second time had that precious package been deposited in what seemed a secure hiding-place, and a second time had the hiding-place proved almost a public thoroughfare.

For what seemed a long time Harry examined that stone. In vain. The wall arose before him impenetrable. The stone was immovable. Yet that stone seemed now to him to hold within itself the secret not only of the package, but also of escape and of liberty and life.

Harry at length felt like giving up. Once more, however, though now quite hopelessly, he examined the stone in every direction, pressing with all his strength upon every part. And now in this, the very moment of his utter hopelessness, as often happens—at the very time when not expecting it, he found what he sought.

At the extreme end of the stone, more than six feet from the crevice where he had hidden the package, he pressed upon it, and found that it gave way. The pressure was not at all strong; yet to that slight effort the apparently massive rock yielded like a door, and moved inward several inches.

In unspeakable amazement and intense excitement Harry pushed it in farther, until he saw the whole move in, at his pressure, for about two feet. An opening was disclosed. He stepped in and looked around.

He found himself in a kind of chamber which was about four feet wide and eight feet long. At the end of this was a stone stair-way which went down. Harry looked around, and took all this in at a glance. His first thought was about his package.