'Farewell and prosper, and put thy trust in Allah, and forget not the day of judgment,' the angel said, and immediately returned to paradise. So Khaled was left alone in the Red Desert, a living man obliged to shift for himself, liable to suffer hunger and thirst or to be slain by robbers, with no worldly possessions but his sword, his bay mare, and the clothes on his back. He knew moreover that he was more than two hundred miles from the city of Riad, and he knew that he could not accomplish this journey in less than four days. For when he was one of the genii he had often watched men toiling through desert on foot, and on camels and on horses, and had laughed with his companions at the slow progress they made. But now it was no laughing matter, for he had forgotten to ask the angel for dates and water, or even for a few handfuls of barley meal. He turned the mare's head westward of the Goat, in which is the polar star, for he remembered that when he had carried away the Indian prince he had flown toward the south-east, and as he began to gallop over the dark sand he laughed to himself. 'What poor things are men and their horses,' he said. 'To destroy me, this mare need only stumble and lame herself, and we shall both die of hunger and thirst in the desert.' This reflection made him at first urge the mare to her greatest speed, for he thought that the sooner he should be out of the desert and among the villages beyond, the present danger would be passed. But presently he bethought him that the mare would be more likely to stumble and hurt herself in the dark if she were galloping than if she were moving at a moderate pace. He therefore drew bridle and patted her neck and made her walk slowly and cautiously forward. But this did not please him either, after a time, for he remembered that if he rode too slowly he must die of hunger before reaching the end of his journey. 'Truly,' he said, 'one must learn what it is to be a man, in order to understand the uses of moderation. Gallop not lest thy horse fall and thou perish! Nor delay walking slowly by the road, lest thou die of thirst and hunger! Yet thou art not safe, for Al Walid died from treading upon an arrow, and Oda ibn Kais perished by perpetual sneezing. Allah is just and merciful! I will let the mare go at her own pace, for the end of all things is known.' The mare, being left to herself, began to canter and carried Khaled onward all night without changing her gait. 'Nevertheless,' thought Khaled, 'if we are not soon out of the desert we shall suffer thirst during the day as well as hunger.' When there was enough daylight to distinguish a black thread from a white, Khaled looked before him and saw that there was nothing but red sand in hillocks and ridges, with ghada bushes here and there. But still the mare cantered on and did not seem tired. Soon the sun rose and it grew very hot, for the air was quite still and it was summer time.