"I know because I can see with both eyes," replied Pete sharply. "I don't have to have it all written out for me when I see what's happened to that boat." "Why should anybody want to wreck it?" inquired Fred. "It might be safer for some people if they started down the stream from here not to have any boats around that could follow." "Do you think those two men who were in our camp took the boat?" Fred inquired abruptly. "That's exactly what I think. And I think too," the guide added as he stopped to examine other parts of the boat, "that this skiff was wrecked as well as smashed. There's a hole stove in the bottom and then there are places that have been cut by an axe so I guess both parts of the story are true." "Do you suppose they went up Thorn's Gulch from here?" asked Fred in a low voice. "That's just what I think they did," replied Pete. "Do you think we may meet them somewhere in the Gulch?" "I shouldn't be a bit surprised." "Then we may have pretty serious trouble before we're done." "Right you are," assented Pete. "But it's time for us to be moving, boys," he added. "Here, I'll help each of you with his pack and we'll start out. If those two men are ahead of us we'll know it before they know that we're following them." CHAPTER XIII ALONE IN THE CANYON For a considerable distance the way along which the guide was leading was not difficult. The footing was fairly strong and there were not many obstacles to be met. Both boys in spite of the exciting experiences of the morning were deeply interested in the marvelous sights which greeted them as they advanced into the gulch. On the sides of the canyon layers of rock and earth of different colors were plainly to be seen. Occasionally there were strange formations that extended from the rim of the cliff to the bottom of the valley that were like huge buttresses fashioned by the hands of men. "Look at that!" exclaimed Fred, calling the attention of John to one of these peculiar formations. "That looks exactly as if it had been cut out by a mason." "It certainly does," acknowledged John, stopping and gazing at the interesting sight. "Indeed, if we had this place back east," he continued, "it would not be difficult to make some people believe that it had been especially designed so that they could charge a dime a head to come in to see it. What do you suppose Coney Island would do with the Grand Canyon?" "I guess Coney Island, if it had the Grand Canyon, would hide in some little corner. You wouldn't see much of the Island in a place like that." Pete was not leading his young charges at a rapid pace. In spite of the fact that they were at the bottom of the gulch the altitude was still so high that breathing was somewhat difficult. They steadily continued on their way for two hours, making only occasional stops. Then they halted for the midday rest and the preparation of the luncheon which Pete at once began to get ready.