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20 believing now that the wady would be found to the west; while Ismail, advised by Amin, elected for a southerly direction. At last it was agreed that Ismail, Hassan, and some men should ride hard in a southwesterly direction, in the hopes of picking up some branch caravan route leading to El Agia. The remainder of the caravan, with myself and Amin, were to travel easily in a southerly direction for five hours, and then halt and await the return to us of Ismail. We halted between three and four in the afternoon, but no sooner had we done so, when a heavy sandstorm burst upon us. There are varieties of sandstorms as there are of most other things, but this was one of the worst varieties. The air becomes thick with the finest particles, which gives one more the idea of a yellow fog in the north than of anything else I might liken it to. We were obliged to wrap our own and the camels' heads in cloths and blankets to protect ourselves, if not from suffocation, from something very near it. The storm lasted until after sunset, and as it must have obliterated all traces of our tracks, scouts were sent out to sight Ismail. Up till midnight no signs of him were forthcoming. Breaking up what camel saddles we could spare, we lit fires to attract his attention to our position, and as these burned low, shots were fired at intervals of five minutes. After ten or twelve shots had been fired, I recommended that volleys of five should be fired at the same intervals, and when I believe six had been fired, we heard Ismail calling to us from the darkness. He had encountered the sandstorm, but evidently had had