Desert Gold by Zane Grey

When he awakened he found, to his surprise, that his companion had departed. A trail in the sand led off to the north. There was no water in that direction. Cameron shrugged his shoulders; it was not his affair; he had his own problems. And straightway he forgot his strange visitor.

Cameron began his day, grateful for the solitude that was now unbroken, for the canyon-furrowed and cactus-spired scene that now showed no sign of life. He traveled southwest, never straying far from the dry stream bed; and in a desultory way, without eagerness, he hunted for signs of gold.