A merciful darkness fell over those sorely imperilled beings, and the vessel itself seemed about to be overwhelmed by an avalanche of sand and dirt and mixed debris. Then came a dizzy, rocking lurch, followed by a shock which nearly cast uncle and nephews from their frantic holds, and the air-ship appeared to be whirled end for end, cast hither and yon, wrenched and twisted as though all must go to ruin together. A blast as of superheated air smote upon them one moment, while in the next they were whirled through an icy atmosphere, then tossed dizzily to and fro, as their too-frail vehicle spun upward as though on a journey to the far-away stars. A shrieking blast of wind served to briefly clear away the choking dust, affording the trio a fleeting glimpse of their immediate surroundings: hurtling sticks and stones, splintered tops of trees, shrubs with wildly lashing roots freshly torn from the bed of years, all madly spinning through a blinding, scorching, freezing mass of crazily battling winds, the different currents twining and weaving in and out, as so many hideous serpents at play. A moment thus, then that horrid uproar grew still more deafening, and the air-ship was whirled high and higher, in a dizzy dance, those luckless creatures clinging fast to whatever their frenzied hands might clutch, feeling that this was the end of all. Further sight was denied them. They were powerless to move a limb, save as jerked painfully by those shrieking currents. Breath was taken away, and an enormous weight bore down upon them, threatening to produce a fatal collapse through their ribs giving way. Upward whirled the flying-machine, powerless now as those wretched beings within its cunning shape, smitten sharply here and there by some of those ascending missiles, yet without receiving material injury; until a last shivering lurch came, ending in a sudden fall. A dizzying swoop downward, but not to death and destruction, for the aerostat alighted easily upon what appeared to be a sort of air-cushion, and, though unsteady for a brief space, then settled upon an even keel. “Cling fast--for life!” huskily gasped the professor, unwittingly repeating the caution which had last crossed his lips, which he had ever since been striving to enunciate, faithful to his guardianship over these, his sole surviving relatives. “I don't--where are we?” Waldo lifted his head to peer with half-blind eyes about them, in which action he was imitated by both brother and uncle; but, for a brief space, they were none the wiser. All around the aeromotor rose a wall of whirling winds, seemingly impenetrable, apparently within reach of an extended arm, changing colour with each fraction of a second, hideously beautiful, yet never twice the same in blend or mixture.