They all turned toward the brook when the three, who were racing toward them, neared. "What, ho!" Dan called gayly, and Jane noted that never before had she seen in her brother's face an expression of such radiant happiness. "Did you three see a bear? It never will do for us to go back East without having at least sighted a grizzly." To the surprise of the four who awaited them, the newcomers became suddenly embarrassed, and even Bob acted as though he hardly knew what to say, which was quite unusual in so straightforward and impulsive a lad. "Dan," he said, "may I speak with you a moment?" The older boy walked away from the curious group of girls. "We did not know that Meg Heger had come," Bob began, "and we were just going to call out that we had found another place where we would like to look for the lost box. It's such a queer place, Dan, but it is one that as yet we have not investigated. Can't we get away from the girls somehow? Gerald and Julie and I want to show the spot to _you_ at least." "Why, I presume so," Dan agreed, and after explaining to the three older girls that Bob and the youngsters wished to show him something, he followed them back along the brook. It was the way that he had gone on that day when he had first visited the Heger cabin. When they reached the waterfall which Dan had thought so pretty, they climbed down to the red rock basin into which it fell. Excitedly, Gerald pointed back of the tumbling water. "Look-it, Dan!" he fairly shouted. "See that little cave opening in there! Doesn't it look to you as if it had been made with a pickaxe? Bob thinks it does." Dan looked through the transparent sheet of hurrying water and smilingly shook his head as he replied: "I don't suppose that a human being has ever been through that crevice, and, moreover, I don't quite see how we can investigate, do you, Bob?" Dan, noting the disappointed expression on his small brother's face, turned toward the older boy. "We sort of had it figured out that Gerald could stand back of the waterfall and then he could see better whether that is just a crevice in the rocks or the mouth of a cave." The youngest boy looked up eagerly. "You know, Dan, I fetched along my bathing suit. Mayn't I go back to the cabin and put it on? Mayn't I, Dan?" "Why, of course, if you wish, but perhaps you had better say nothing to the girls about it. I do not like to have Meg know that we are searching for that box, since there is no real likelihood of our finding it." Luckily the girls were not in sight, and so no questions were asked of the small boy, who dived into his own room, donned his bathing suit and raced away, without having been seen. Dan held the younger boy's hand in a tight clasp as Gerald went down into the clear, cold pool. "Now, hold your breath and step up on that ledge back of the waterfall," the older brother advised. Julie watched wide-eyed, almost frightened.