"I suppose the most of them are dead," answered David. "And we may join them unless we get out. Our chances look slim."

"I don't know about that," objected Ned. "I notice that the smell of powder is not so pronounced as it was a while ago. The air in here seems much better than it did before the explosion, and I believe that somewhere a passage has been opened which permits the air to flow in. It seems to me I can smell sweet air."

"I believe you're right, Ned," declared Harry sniffing.

"Let's get at these stones, then," suggested Jack, suiting the action to the word, and beginning to lift away lighter pieces of rock from the heap that confronted the lads.

All the boys took hold eagerly and began the task of removing the barrier that prevented their exit. They took turns holding the searchlight upon the work. Presently Jack announced that he could see light through the crevices between the stones. This announcement was hailed joyfully by the others.

"Hurrah!" announced Harry gleefully, as he pushed a piece of rock forward, opening a space wide enough to penult him to thrust an arm through. "One more chunk out of here and we can get through."

In another moment the four boys stood erect in a space that had formerly been a cellar. They drew deep draughts of air into their lungs and looked up beyond ruined walls to see the sky overhead.

"That looks good to me," stated Ned, pointing upward.

"Here too!" put in David. "Now I can get a good look at you fellows and will be able to recognize you readily the next time I see you. My," he added, "you are Boy Scouts, too."

"Why, of course," said Ned in astonishment. "What did you think we were? I hope you didn't take us for soldiers."