Rocks-naked, hard, red-brown rocks all round; not a bush, not a blade, not a clinging moss such as elsewhere nature has lightly flung on the rocky surface of the heights, as if a breath of her creative life had softly touched the barren stone. Nothing but smooth granite, and above it a sky as bare of cloud as the rocks are of shrubs and herbs.And yet in every cave of the mountain wall there moves a human life; two small grey birds too float softly in the pure, light air of the desert that glows in the noonday sun, and then they vanish behind a range of cliffs, which shuts in the deep gorge as though it were a wall built by man.