All at once I came upon a place where the bed-rock rose stark through the sand and formed a low cliff; and here I saw with joy what seemed to promise further traces of the antediluvian people. Hewn rudely on the face of the cliff were the unmistakable facades of several small, squat rock houses or temples, whose interiors might preserve many secrets of ages too remote for calculation, though sandstorms had long since effaced any carvings which may have been outside.