in the greater gusts, wrapped the sight of our road from us and drove our complaining camels up and down. But Auda was anxious about the morrow, for another hot headwind would delay us a third day in the desert, and we had no water left: so he called us early in the night, and we marched down into the plain of the Biseita (so called in derision, for its huge size and flatness), before day broke. Its fine surface-litter of sun-browned flints was restfully dark after sunrise for our streaming eyes, but hot and hard going for our camels, some of which were already limping with sore feet.
Camels brought up on the sandy plains of the Arabian coast had delicate pads to their feet; and if such animals were taken suddenly inland for long marches over flints or other heat-retaining ground, their soles would burn, and at last crack in a blister; leaving quick flesh, two inches or more across, in the centre of the pad. In this state they could march as ever over sand; but if, by chance, the foot came down on a pebble, they would stumble, or flinch as though they had stepped on fire, and in a long march might break down altogether unless they were very brave. So we