are no trees—but the roar of the whirlwind drowned the calls of the guide and the bellowing of the animals. In the atmosphere could be smelt an odor such as coal smoke gives. The camels stood still and, turning away from the wind, they stretched their long necks downward so that their nostrils almost touched the sand.
The Sudânese, however, did not wish to allow a stop, as caravans which halt during a hurricane are often buried in sand. At such times it is best to speed with the whirlwind, but Idris and Gebhr could not do this, for in thus doing they would return to Fayûm from where they expected a pursuit. So when the first gale passed they again drove the camels.
A momentary stillness ensued but the ruddy dusk dissipated very slowly for the sun could not pierce through the clouds of dust suspended in the air. The thicker and heavier particles of sand began to fall. Sand filled all the cracks and punctures in the saddles and clung to the folds of the clothes. The people with each breath inhaled dust which irritated their lungs and grated their teeth.
Besides, the whirlwind might break out again and hide the whole world. It occurred to Stas that if at the time of such darkness he was with Nell on the same camel, he might turn around and escape with the wind northward. Who knows whether they would be observed amidst the dusk and confusion of the elements, and, if they succeeded in reaching any village on Bahr Yûsuf near the Nile, Idris and Gebhr would not dare to pursue them for they would at once fall into the hands of the local "police."
Stas, weighing all this, jostled Idris' shoulder and said:
"Give me the gourd with water."
Idris did not refuse for howsoever much that morning
