Hardly had he imparted this information than they were startled by a deep roaring noise from without. It seemed as though the foundations of the mountain were shaken and, remembering what a strange country they were in, Roger could hardly be blamed for starting up with a cry of alarm.
The light that came in through the mouth of the fissure suddenly gave way to darkness; only the flickering gleam of their fire remaining to show them which way to move.
“Oh, what has happened now?” asked Roger, and as usual Dick seemed to know.
“It is a snow avalanche,” he told them, “and I am afraid it has blocked our only means of leaving here, so that we are once more prisoners!”
CHAPTER XXV
THE SNOW AVALANCHE
“A snow avalanche!” echoed Roger. “Do you mean it has come down from the side of the mountain, and filled the opening we used to get in here?”
“Yes,” explained Dick, “that is what has happened, as near as I can tell. But, after all, it may not be so serious a thing. We will see what can be done about breaking through.”
“We have to get out some way or other, that’s sure!” declared Roger, as he hurried along after his cousin, now heading for the place where the exit had been.