"Yes, and a perfectly _smooth_ rock at that," added Roger, as though he knew this to a certainty, and it added to the mystery in his eyes. "I believed these boats were tough enough to stand ten times that amount of pounding. I believe after all I prefer our old style of dugout." "Yes, they may be clumsy, but you can depend on them all the time; and after this I think I'll be suspicious about a hide boat," Dick continued. The shore was now close at hand, and they found little difficulty in making a landing. At the same time the half sunken Indian boat was dragged up on the bank, and tipped over to relieve it of the water, though that began to pour out through the rent in the bottom as soon as it left the river. It was only natural that the two boys should first throw themselves down on the soft bank to regain some of their breath after such an exciting time. Then, having been brought up in the school of preparedness, their next act was to examine their guns, and to renew the priming of powder in the pan, so that the weapons, on which, they always depended to defend themselves against sudden perils, would be in condition for immediate use in case of necessity. In those days old heads were to be found on young shoulders. Responsibility caused lads, hardly entering their teens, to become the defenders of their families, as well as hunters and trappers. And the Armstrong cousins had long filled a position of trust of this description in the home circles. "Well, we shot the rapids, all right," remarked Roger, presently, with a whimsical smile; "but not exactly as we had planned. Now we can have the pleasure of walking back to camp. At least it saves us the bother of paddling all the way, after making a carry around the rapids. And we meant to give our boat to one of the Mandan boys, you remember, Dick." "I'm puzzled about that boat," remarked the other, frowning. "I suppose you mean you wonder what made it play such a treacherous trick on us, after standing the wear and tear of the winter," Roger observed. "Yes, for you remember we examined it closely only yesterday, and made sure it was in perfect condition. Suppose we take a look at that break, and see how it happened to come." "Oh! the chances are," said Roger, carelessly, "the old hide became worn or weak through age, and gave way. Still," he added, "that was only a little bump, Dick, and I'm as bothered as you are how to explain it." In another minute they were bending over the upturned canoe. Immediately both boys uttered exclamations of astonishment, as though they had made a discovery that gave them an unexpected thrill. "Why, it looks as if a sharp knife blade had been drawn straight down along here, and cut nearly through the skin, so that even a little blow would finish it!" exclaimed Roger, turning his troubled eyes upon his cousin as if to ascertain whether the other agreed with him.