"We rest," declared Steve. "There's no water in this hellish country. No use in goin' on forever. My legs are stiff as gun-barrels. I couldn't take another step to save my neck. Here's a kind of stunted cliff, about as high as a man's shoulder, facing south. We'll sleep in the lee of it." "And shall we not keep watch, Steve sahib?" "We don't," answered Steve. "If the Arabs cut our throats while we're asleep, so much the better. We're goners anyhow." With which optimistic observation Clarney lay down stiffly in the deep sand. But Yar Ali stood, leaning forward, straining his eyes into the elusive darkness that turned the star-flecked horizons to murky wells of shadow. "Something lies on the skyline to the south," he muttered uneasily. "A hill? I cannot tell, or even be sure that I see anything at all." "You're seeing mirages already," said Steve irritably. "Lie down and sleep." And so saying Steve slumbered. The sun in his eyes awoke him. He sat up, yawning, and his first sensation was that of thirst. He lifted his canteen and wet his lips. One drink left. Yar Ali still slept. Steve's eyes wandered over the southern horizon and he started. He kicked the recumbent Afghan. "Hey, wake up, Ali. I reckon you weren't seeing things after all. There's your hill—and a queer-lookin' one, too." The Afridi woke as a wild thing wakes, instantly and completely, his hand leaping to his long knife as he glared about for enemies. His gaze followed Steve's pointing fingers and his eyes widened. "By Allah and by Allah!" he swore. "We have come into a land of djinn! That is no hill—it is a city of stone in the midst of the sands!" Steve bounded to his feet like a steel spring released. As he gazed with bated breath, a fierce shout escaped his lips. At his feet the slope of the ridge ran down into a wide and level expanse of sand that stretched away southward. And far away, across those sands, to his straining sight the "hill" slowly took shape, like a mirage growing from the drifting sands. He saw great uneven walls, massive battlements; all about crawled the sands like a living, sensate thing, drifted high about the walls, softening the rugged outlines. No wonder that at first glance the whole