That moan was a forerunner of others, growing louder and longer until the weird sound became continuous. Then the movement of wind was accelerated and began to carry a fine dust. Dark as the night was, it did not hide the pale sheets of dust that moved along the level plain. Tappan’s feet felt the slow rise in the floor of the valley. His nose recognized the zone of borax and alkali and niter and sulphur. He had reached the pit of the valley at the time of the furnace winds. The moan augmented to a roar, coming like a mighty storm through a forest. It was hellish--like the woeful tide of Acheron. It enveloped Tappan. And the gale bore down in tremendous volume, like a furnace blast. Tappan seemed to feel his body penetrated by a million needles of fire. He seemed to dry up. The blackness of night had a spectral, whitish cast; the gloom was a whirling medium; the valley floor was lost in a sheeted, fiercely seeping stream of silt. Deadly fumes swept by, not lingering long enough to suffocate Tappan. He would gasp and choke--then the poison gas was gone on the gale. But hardest to endure was the heavy body of moving heat. Tappan grew blind, so that he had to hold to Jenet, and stumble along. Every gasping breath was a tortured effort. He could not bear a scarf over his face. His lungs heaved like great leather bellows. His heart pumped like an engine short of fuel. This was the supreme test for his never proven endurance. And he was all but vanquished. Tappan’s senses of sight and smell and hearing failed him. There was left only the sense of touch--a feeling of rope and burro and ground--and an awful insulating pressure upon all his body. His feet marked a change from salty plain to sandy ascent and then to rocky slope. The pressure of wind gradually lessened: the difference in air made life possible; the feeling of being dragged endlessly by Jenet had ceased. Tappan went his limit and fell into oblivion. When he came to, he was suffering bodily tortures. Sight was dim. But he saw walls of rocks, green growths of mesquite, tamarack, and grass. Jenet was lying down, with her pack flopped to one side. Tappan’s dead ears recovered to a strange murmuring, babbling sound. Then he realized his deliverance. Jenet had led him across Death Valley, up into the mountain range, straight to a spring of running water. Tappan crawled to the edge of the water and drank guardedly, a little at a time. He had to quell terrific craving to drink his fill. Then he crawled to Jenet, and loosening the ropes of her pack, freed her from its burden. Jenet got up, apparently none the worse for her ordeal. She gazed mildly at Tappan, as if to say: “Well, I got you out of that hole.” Tappan returned her gaze. Were they only man and beast, alone in the desert? She seemed magnified to Tappan, no longer a plodding, stupid burro. [Illustration: THIS WAS THE SUPREME TEST FOR HIS NEVER-PROVEN ENDURANCE, AND HE WAS ALL BUT VANQUISHED]