The sand dunes had indeed beaten themselves out against the wall of a giant mesa. Rhoda followed blindly along the wall and stumbled upon a precipitous trail leading upward.
CHAPTER XVIII
THE FORGOTTEN CITY
Up this tortuous trail Rhoda staggered, closely followed by DeWitt. At a level spot the girl paused.
"Water, John! Water!" she cried.
The two threw themselves down and drank of the bubbling spring until they could hold no more. Then Rhoda lay down on the sun-warmed rocks and sleep overwhelmed her.
She opened her eyes to stare into a yellow moon that floated liquidly above her. Whether she had slept through a night and a day or whether but a few hours had elapsed since she had staggered to the spring beside which she lay, she could not tell. She lay looking up into the sky languidly, but with clear mind. A deep sigh roused her. DeWitt sat on the other side of the spring, rubbing his eyes.
"Hello!" he said in a hoarse croak. "How did we land here?"
"I led us here sometime in past ages. When or how, quién sabe?" answered Rhoda. "John, we must find food somehow."