Blood of The Gods by Robert E. Howard — Read

The caves of El Khour pit the sheer eastern walls of a gaunt hill-range that rises like a stony backbone out of a waste of rocky plains. There is only one spring in the hills; it rises in a cave high up in the wall and curls down the steep rocky slope, a slender thread of silver, to empty into a broad shallow pool below. The sun was hanging like a blood-red ball above the western desert when Francis Xavier Gordon halted near this pool and scanned the rows of gaping cave-mouths with blood-shot eyes. He licked heat-blackened lips with a tongue from which all moisture had been baked. Yet there was still a little water in the skin on his shoulder. He had economized on that gruelling march, with the savage economy of the wilderness-bred.

It seemed a bit hard to realize he had actually reached his goal. The hills of El Khour had shimmered before him for so many miles, unreal in the heat-waves, until at last they had seemed like a mirage, a fantasy of a thirst-maddened imagination. The desert sun plays tricks even with a brain like Gordon's. Slowly, slowly the hills had grown up before him--now he stood at the foot of the eastern-most cliff, frowning up at the tiers of caves which showed their black mouths in even rows.