“The sand scorches me,” said the hunter, “as though it had just come out of a furnace; and not a cloud in this sky of fire. It’s enough to drive one mad!”
“Let us not despair,” responded the doctor. “In this latitude these intense heats are invariably followed by storms, and the latter come with the suddenness of lightning. Notwithstanding this disheartening clearness of the sky, great atmospheric changes may take place in less than an hour.”
“But,” asked Kennedy, “is there any sign whatever of that?”
“Well,” replied the doctor, “I think that there is some slight symptom of a fall in the barometer.”
“May Heaven hearken to you, Samuel! for here we are pinned to the ground, like a bird with broken wings.”
“With this difference, however, my dear Dick, that our wings are unhurt, and I hope that we shall be able to use them again.”
“Ah! wind! wind!” exclaimed Joe; “enough to carry us to a stream or a well, and we’ll be all right. We have provisions enough, and, with water, we could wait a month without suffering; but thirst is a cruel thing!”
It was not thirst alone, but the unchanging sight of the desert, that fatigued the mind. There was not a variation in the surface of the soil, not a hillock of sand, not a pebble, to relieve the gaze. This unbroken level discouraged the beholder, and gave him that kind of malady called the “desert-sickness.” The impassible monotony of the arid blue sky, and the vast yellow expanse of the desert-sand, at length produced a sensation of terror. In this inflamed atmosphere the heat appeared to vibrate as it does above a blazing hearth, while the mind grew desperate in contemplating the limitless calm, and could see no reason why the thing should ever end, since immensity is a species of eternity.
Thus, at last, our hapless travellers, deprived of water in this torrid heat, began to feel symptoms of mental disorder. Their eyes swelled in their sockets, and their gaze became confused.
When night came on, the doctor determined to combat this alarming tendency by rapid walking. His idea was to pace the sandy plain for a few hours, not in search of any thing, but simply for exercise.