Riding between two or three of these built-up islands, we made for the far bank of the valley. On our way was the main bed of the winter floods, a sweep of white shingle and boulders, quite flat. Down its middle, from palm-grove on the one side to palm-grove on the other, lay a reach of clear water, perhaps two hundred yards long and twelve feet wide, sand-bottomed, and bordered on each brink by a ten-foot lawn of thick grass and flowers. On it we halted a moment to let our camels put their heads down and drink their fill, and the relief of the grass to our eyes after the daylong hard glitter of the pebbles was so sudden that involuntarily I glanced up to see if a cloud had not covered the face of the sun.