The water fell with such a gentle sound that the two were able to converse in ordinary tones when standing directly at the base. Both knelt down and tasted the cool and refreshing element, and then Mickey, torch in hand, led the way up stream again. Through this world of gloom the two made their way with considerable care. Mickey cherished a lingering suspicion that there might be some one else in the cave besides themselves, in which case he and Fred would offer the best target possible; but he was willing to incur the risk, and, although he moved slowly, it was with a decision to see the thing through, and learn all that was to be learned about the cave. The stream was followed about a hundred yards above the falls, when the explorers reached the point where it entered the cave, and the two made the closest examination possible. On the way to the point the two had acquired considerable information. The roof of their underground residence had a varying height from the floor of from twenty to fifty feet. The floor itself was regular, but not sufficiently so to prevent their walking over it with comparative ease. The stream was only five or six feet in width and wherever examined was found to be quite shallow. It flowed at a moderate rate, and it entered the cavern from beneath a rock that ascended continuously from the floor to the roof. “Freddy, my laddy; do you take this torch and walk off aways, so that it will be dark here,” said Mickey to his companion. The latter obeyed, and the man made as critical an examination as he could. His object was to learn whether the water came into the cave from the outer world, or whether its source was beneath the rock. If the former, there was possibly a way out by means of the stream, provided the distance intervening was not too great. Mickey thought that if this distance were passable, there would be some glimmer of light to indicate it. But, when left alone in the darkness, he found that there was not the slightest approach to anything of the kind, and he was compelled to acknowledge that all escape by that direction was utterly out of the question. Accordingly, he called Fred to him, and they began the descent of the stream. When they reached the falls, they paused below them, and Micky held the torch close to the water, where it was quiet enough for them to observe the bottom. “Tell me whether ye can see anything resimbling fishes?” The lad peered into the water a minute, and them caught a flash of silver several times. “Yes, there's plenty of them!” he exclaimed, as the number increased, and they shot forward from every direction, drawn to the one point by the glare of the torch. “There's enough fish for us, if we can only find some way to get them out.”