prospects more gloomy. He was half tempted to give himself up for lost.
It was an easy matter to keep himself on the surface, for he was really a good swimmer, but now the current was so strong that he could scarcely touch either side of its rocky confines as he was swept along, he knew not where. Allen had never explored this stream, and this to him made the immediate future look blacker than ever.
"If it ends in some sort of a sink hole, I'm a goner sure," he thought. "But I never heard of such a hole up here among the mountains, so I won't give up just yet."
Hardly had the thought occupied his mind when, on looking up, he saw the last trace of evening fade from sight. The river had entered a cavern! He was now underground!
It may well be imagined with what dismay Allen, stout-hearted as he was, viewed the turn of the situation. Here he was being borne swiftly along on an underground river, he knew not where. It was a situation calculated to chill the bravest of hearts.
All was pitch black around and overhead; beneath was the silent and cold water, and the only
