Once upon a time, a large caravan moved slowly over the desert. On the vast plain, where nothing was to be seen but sand and sky, might have been heard in the far distance the tinkling bells of the camels and the ringing hoof beats of horses. A thick cloud of dust that moved before it indicated the approach of the caravan; and when a breeze parted this cloud, gleaming weapons and brilliantly colored garments dazzled the eye. Thus was the caravan revealed to a man who galloped towards it from one side. He rode a fine Arabian horse, covered with a tiger skin; from the deep-red trappings depended little silver bells, while on the horse's head waved a plume of heron feathers. The horseman was of stately bearing, and his attire corresponded in richness with that of his horse. A white turban, richly embroidered with gold, covered his head; his coat and Turkish trousers were of scarlet; while a curved sword, with a rich hilt, hung at his side. He had pulled the turban down well over his face; and this, with the black eyes that flashed from beneath the bushy brows, together with the long beard that hung straight down from his Roman nose, gave him a fierce and uncouth appearance.