his shoulder. He was thoroughly alarmed and leaped to a spot beyond, literally dragging Roger with him.
"That was a close shave!" murmured the senator's son. "Dave, this spot is full of perils!"
On they went once more, until Dave was almost certain he saw some sort of an opening ahead of them. He pointed it out; and just then the tiny light of the pocket lantern began to flicker.
"Dave, the light is going out!"
"I know it."
"Can't you turn it up a bit?"
"No; the oil is gone," was the answer, after Dave had shaken the lantern to make certain of that fact.
"What will we do if we are left in the dark?"
"Hurry; I think we can reach that opening—if it is an opening."
They ran, and as they did so the lantern flickered up for the last time and went out. Then Dave stopped short and Roger clung to him.
"Don't stop here, Dave!"
"I won't—but we must go slow, or we'll knock our heads on a rock or on the icicles."
They advanced with all the caution they could command. Each was filled with a nameless dread, for if there was no opening ahead what should they do? To go back the way they had come was next to impossible in the dark.
