Before long Walker's fascination had developed into a bad case of fright. He took the most extraordinary precautions at each of the nightly camps, always clearing away whatever vegetation he found, and avoiding stony places whenever he could. Every clump of stunted bushes and every cleft in the great, slab-like rocks seemed to him now to hide malevolent serpents, while every human figure not obviously part of a settlement or emigrant train seemed to him a potential snake-god till nearness had proved the contrary. Fortunately no troublesome encounters came at this stage to shake his nerves still further.