"What about the powder room?"
"The—the—the pow——" stammered Jarvis.
"Yes; what about it?"
"Why—why, the fire must be right on it at this very minute. I—I never thought of it before. I——"
"Then the whole mine will be blown up!" cried Steve. "There are more than five tons of dynamite in that room!"
CHAPTER VI
THROUGH TUNNELS OF FLAME
STEVE waited not a moment.