306 THE EMPTY QUARTER for the dawn prayer and a light breakfast. The rain had been with us intermittently throughout this march, and towards dawn there was a good deal of thunder and lightning in the south. On resuming the march after an hour's halt we passed almost immediately into the district of Hadh Bani Zainan, an immense gently-undulating drought-stricken plain in which practically all the vegetation except a few Abal bushes was dead. The stumps and long-exposed roots of the larger thickets were black as if they had been burned with fire. It was indeed a desolate scene through which we rode, mostly in silence. It was pleasant to ride bareheaded in the tempered sunlight. The wind had dropped to nothing, and the sky was trying to clear. Again there was no sign of life anywhere though in two spots we observed Oryx dung. We were in the very midst of the Oryx country, but our hunters had lost all inclination for the chase. It was indeed amazing that during all these weeks not one of us had ever had a glimpse of the animal, which we had hoped so confidently to meet in large numbers. 'All Jahman had even spoken of the possibility of eking out our water-supply in emergency by squeezing out the liquid contained in the tripe of the animals we should shoot. Supposing one was very thirsty, I asked Salim as we rode along ahead of our companions as usual, and had no water, could one make shift with the urine of camels ? You use it to wash your hair and as medicine for your stomach. Could you also use it for ordinary drinking purposes if hard pressed ? No, he replied, it would but make you more thirsty, but we do sometimes get a deal of drinkable liquid in another way. We take the undigested food'from a camel's cud and squeeze the water out of it. Have you ever gone thirsting for a long period, Salim ? I asked. Perhaps two days, but not more, he replied, and praise be to God ! I have heard of men who have been longer without water; perhaps four days, but scarcely more, God knows. As the morning wore on, patches of beautiful blue sky began to chequer the wide-spread pattern of clouds and the sun grew quite hot behind a thin film of haze. The atmo- sphere was rather stifling, and the surface of the sand seemed