Shortly after this occurrence it began to grow dark above, but the cause was obvious. The day was drawing to a close. Darkness, only less profound than that within the cave below, was enwrapping the surface above. As soon as the night had fairly descended, Mickey O'Rooney, handling a small torch with great care, made his way once more to the puzzling outlet of the underground stream. The inspection satisfied him of the accuracy of his theory. Not the slightest tinge of light relieved the impenetrable gloom. Mickey considered this strong proof that it was but a short distance to the free air outside, and his courage rose very nearly to the sticking point of making the experiment then and there. “But we both naad sleep,” he mused, as he threw down his torch, and made his way back by the dull glare of the expiring camp-fire. “We both lost considerable last night, and a chap can't kaap reg'lar hours any more than he can when he's coorting three lassies at the same time, and thrying to kaap aich from suspecting it. I faal as though we shall have something lively to do to-morrow, and so we'd better gain all the slumber we kin.” When he reached the camp, he found the lad anxiously awaiting his return. They had signaled to each other several times, but the presence of the danger overhead rendered the boy more uneasy than usual when they were apart. “Have ye observed nothing?” asked Mickey, in an undertone. “Nothing at all.” “It's too dark I know, to see, but mebbe yees have heerd something to tell ye that the spalpeens are up there still.” “You may be sure I listened all I know how, but everything has kept as still as the grave. I haven't heard the fall of a pebble even. What do you think the Indians mean to do?” “Well it's hard to tell. It fooks as though they didn't think we fell in, but had come down on purpose, and had some way of getting out as easy, and they're on the look out for us.” “Maybe, Mickey, there's some other way of coming in, that we haven't been able to find.” “I hoped so a while ago, but I've guv it up. If them spalpeens knowed of any other way, what do they mean by fooling around that place up there, where they're likely to get shot if they show themselves, and they're likely to lose the best blankets they've got?” Fred did not feel competent to answer this question, and so he was forced to believe that Mickey was right in his conclusion that there was no other way of entering the cave than by the skylight above. “Which the same thing being the case, I propose that we thry and see how the new blanket answers for a bed. Begorrah! but its fine, as me mither used to say when she run her hands over the head of me dad, and felt the lumps made by the shillelah.”