The fatigue was showing in the two younger dogs. Their feet had been cut in several places in crossing the first range of mountains. During the past nights in the valley, though their master was keeping a sharp lookout, they encountered several places where sand-burrs were plentiful. These burrs in the tender inner part of a dog's foot, if not removed at once, soon lame it. Many times had the poor creatures lain down, licking their paws in anguish. On examination during the previous night, their feet were found to be webbed with this burr. Now, on climbing this second mountain, they began to show the lameness which their master so much feared, until it was almost impossible to make them take any interest in the trail. The old dog, however, seemed nothing the worse for his work.
On reachin
