Clarence E. Mulford, The Man from Bar-20 — Chapter 17 (1918)
“ Beginning at a rock slide, a mass of treacherous broken rock and shale in which he sank to his ankles at every plunging step, a faint zigzag line wandered up the southern face of the butte. He did not know that it could be mastered, but he did not have time to gain the easier trail, up which he had led his horse. Struggling up the shale slope, slipping and floundering in the treacherous footing, he flung himself on the rock ledge which slanted sharply upward. ”
