46 THE EMPTY QUARTER The cliffs of the great estuary towered magnificently over the low mist in the young light of dawn as the camels were driven off to the well for their first drink since leaving Dulaiqiya. It was but four days since then—and cool days to boot—and most of the animals spurned the potation offered them. Seven or eight days without water constitute no hardship for camels under such conditions, and they can manage as many as ten in full marching order provided that there be reasonable grazing available on their route. In our case the pastures had been rather poor, and here among the sands round our camp the Ghadha bushes were all miserably brown and dried up by the prevailing drought. The late summer rains had indeed paid a fleeting visit to this country south of the Hasa, but there had not been sufficient precipitation to make the desert blossom. And it was not till two days later that we were to see the first scanty signs of really fresh herbage in the uplands beyond Judairat, where we encountered the faint flush of green that precedes the spreading of spring's welcome carpet over the parched desert. At 8-30 a.m. I started off with my small party on a north- easterly bearing, following the contours of the ground to avoid the higher ridges of sand. Afar off the sea burst upon our view as we topped the first rise, from which we now descended easily from step to step of the high ground on the southern bank of the estuary. The surface was of a friable sandstone weathered in places to queer mushroom shapes and dolmen-like formations. The distant palms of Salwa came into view with the blue sea on one side and the conspicuous flat-topped hillock of Qarn Abu Wail beyond Sikak on the other. The scenery was both impressive and interesting after the dreary monotony of Jafura, and it was still a little puzzling for I had not yet been able to assimilate the true significance of the Jiban formation. Yet slowly enlighten- ment grew upon me and, as I looked upon the cliffs of the valley and the great expanse of salt-flats that stretched out before and below us, I could not resist the conclusion that the broken, sinuous line of the former encircled an ancient estuary, while the latter could not but be an old floor of the sea, from which the waters had receded to their present line