night when we left the foot of the cliff and started down the mountain. We had ten hard miles to go, and no supper, for the hardtack had disappeared ere we were half-way up the mountain. Muir dared not take me across the glacier in the dark; I was too weak to jump the crevasses. So we skirted it and came, after a mile, to the head of a great slide of gravel, the fine moraine matter of the receding glacier. Muir sat down on the gravel; I sat against him with my feet on either side and my arm over his shoulder. Then he began to hitch and kick, and presently we were sliding at great speed in a cloud of dust. A full half-mile we flew, and were almost buried when we reached the bottom of the slide. It was the easiest part of our trip.
Now we found ourselves in the canyon, down which tumbled the glacial stream, and far beneath the ridge