For several minutes Pontiac stood talking earnestly to Foot-in-His-Mouth, and pointing to the waterfall. Then both climbed the rocks at the side of the fall until they could touch the water with their hands. "Something is up now, that's certain!" whispered Dave. The words had just been uttered when a curious thing happened. With a quick movement Pontiac stepped through the waterfall and disappeared from sight! "Well, I never!" murmured Dave. "Where did he go to?" "Hush!" murmured Barringford. "Look!" Foot-in-His-Mouth was gazing fixedly at the waterfall. He hesitated for fully a minute. Then, watching his chance, he dove into the waterfall as Pontiac had done and also disappeared. White Buffalo looked at his white companions gravely. "Do my white brothers know what that means?" he asked. "I think I do," answered Barringford. "There must be a cave back there, and the opening to it is through the waterfall." "But how would they be able to find such a cave?" questioned Dave. "In two ways, lad. There may be some other opening, and they may have discovered this opening when the waterfall had run dry." "It must be a cave," came from White Buffalo. "And if it is, it is the cave Pontiac told about at the village of Ninalicmic." "What did he say about it?" "Pontiac told of planting guns in the ground. He said they would grow, and the Indians could one day pluck them and use them." "Planting guns? I don't understand." "It's an amazement truly," put in Barringford. "We won't know what it means until--" "Until what, Sam? Do you feel like following into the cave?" "I shouldn't mind if I knew the directions Pontiac gave to that other redskin. But without them directions a feller might lose his life easy enough in the attempt. He might have told him to turn to the left or the right, or somethin' like that, you know." "True enough. Well, what do you advise?" The matter was talked over with White Buffalo, and it was decided to remain where they were until Pontiac and Foot-in-His-Mouth returned for their horses. "They are bound to do thet, sooner or later," said Barringford. "By the way they tethered 'em I reckon they expect to come back shortly." An hour passed, and Dave was growing tired of the watch, when White Buffalo, who lay beside him, gave his sleeve a quick jerk and nodded toward the waterfall. As the young hunter looked in the direction he saw a sudden movement, and Pontiac emerged on the rocks, dripping wet. An instant later Foot-in-His-Mouth followed, and both climbed down to the side of the pool. "They have been on some sort o' a mission," whispered Barringford. "Wonder what's next?" Untying their horses, Pontiac and his companion turned them up the slope leading to the stream above the waterfall. Here the pair consulted for some time. What was said neither White Buffalo nor those with him could make out. But soon Pontiac rode off in one direction and Foot-in-His-Mouth in another.