"Seeing that this obstinate pauper possessed that for which the pale owners of millions, at the first touch of palsy or gout, would consent to be paupers, of course I coveted the possession of the essence even more than the knowledge of the substance from which it is extracted. I had no coward fear of the experiment, which this timid driveller had not the nerve to renew. But still the experiment might fail. I must traverse land and sea to find the fit place for it, while, in the rags of the Dervish, the unfailing result of the experiment was at hand. The Dervish suspected my design, he dreaded my power. He fled on the very night in which I had meant to seize what he refused to sell me. After all, I should have done him no great wrong; for I should have left him wealth enough to transport himself to any soil in which the material for the elixir may be most abundant; and the desire of life would have given his shrinking nerves the courage to replenish its ravished store. I had Arabs in my pay, who obeyed me as hounds their master. I chased the fugitive. I came on his track, reached a house in a miserable village, in which, I was told, he had entered but an hour before. The day was declining, the light in the room imperfect. I saw in a corner what seemed to me the form of the Dervish,--stooped to seize it, and my hand closed on an asp. The artful Dervish had so piled his rags that they took the shape of the form they had clothed, and he had left, as a substitute for the giver of life, the venomous reptile of death. "The strength of my system enabled me to survive the effect of the poison; but during the torpor that numbed me, my Arabs, alarmed, gave no chase to my quarry. At last, though enfeebled and languid, I was again on my horse. Again the pursuit, again the track! I learned--but this time by a knowledge surer than man's--that the Dervish had taken his refuge in a hamlet that had sprung up over the site of a city once famed through Assyria. The same voice that in formed me of his whereabouts warned me not to pursue. I rejected the warning. In my eager impatience I sprang on to the chase; in my fearless resolve I felt sure of the prey. I arrived at the hamlet wearied out, for my forces were no longer the same since the bite of the asp. The Dervish eluded me still; he had left the floor, on which I sank exhausted, but a few minutes before my horse stopped at the door. The carpet, on which he had rested, still lay on the ground. I dismissed the youngest and keenest of my troop in search of the fugitive. Sure that this time he would not escape, my eyes closed in sleep.