Persian opium of good quality contains from ten to fifteen percent morphine, and chandu made from opium of Yezd would contain perhaps twenty-five per cent of this potent drug; but because in the act of smoking distillation occurs, nothing like this quantity of morphine reaches the smoker. To the distilling process, also, may be due the different symptoms resulting from smoking chandu and injecting morphia—or drinking tincture of opium, as De Quincey did.  
Rita found the flavor of the preparation to be not entirely unpleasant. Having overcome an initial aversion, caused by its marked medicinal tang, she grew reconciled to it and finished her first smoke without experiencing any other effect than a sensation of placid contentment. Deftly, Mrs. Sin renewed the pipe. Silence had fallen upon the party.
 
The second “pill” was no more than half consumed when a growing feeling of nausea seized upon the novice, becoming so marked that she dropped the ivory pipe weakly and uttered a faint moan.
 
Instantly, silently, Mrs. Sin was beside her.
 
“Lean forward—so,” she whispered, softly, as if fearful of intruding her voice upon these sacred rites. “In a moment you will be better. Then, if you feel faint, lie back. It is the sleep. Do not fight against it.”
 
The influence of the stronger will prevailed. Self-control and judgment are qualities among the first to succumb to opium. Rita ceased to think longingly of the clean, fresh air, of escape from these sickly fumes which seemed now to fill the room with a moving vacuum. She bent forward, her chin resting upon her breast, and gradually the deathly sickness passed. Mentally, she underwent a change, too. From an active state of resistance the ego traversed a descending curve ending in absolute passivity. The floor had seemingly begun to revolve and was moving insidiously, so that the pattern of the carpet formed a series of concentric rings. She found this imaginary phenomenon to be soothing rather than otherwise, and resigned herself almost eagerly to the delusion.
 
Mrs. Sin allowed her to fall back upon the cushions—so gently and so slowly that the operation appeared to occupy several minutes and to resemble that of sinking into innumerable layers of swansdown. The sinuous figure bending over her grew taller with the passage of each minute, until the dark eyes of Mrs. Sin were looking down at Rita from a dizzy elevation. As often occurs in the case of a neurotic subject, delusion as to time and space had followed the depression of the sensory cells.
 
But surely, she mused, this could not be Mrs. Sin who towered so loftily above her. Of course, how absurd to imagine that a woman could remain motionless for so many hours. And Rita thought, now, that she had been lying for several hours beneath the shadow of that tall, graceful, and protective shape.
 
Why—it was a slender palm-tree, which stretched its fanlike foliage over her! Far, far above her head the long, dusty green fronds projected from the mast-like trunk. The sun, a ball of fiery brass, burned directly in the zenith, so that the shadow of the foliage lay like a carpet about her feet. That which she had mistaken for the ever-receding eyes of Mrs. Sin, wondering with a delightful vagueness why they seemed constantly to change color, proved to be a pair of brilliantly plumaged parrakeets perched upon a lofty branch of the palm.
 
This was an equatorial noon, and even if she had not found herself to be under the influence of a delicious abstraction Rita would not have moved; for, excepting the friendly palm, not another vestige of vegetation was visible right away to the horizon; nothing but an ocean of sand whereon no living thing moved. She and the parrakeets were alone in the heart of the Great Sahara.
 
But stay! Many, many miles away, a speck on the dusty carpet of the desert, something moved! Hours must elapse before that tiny figure, provided it were approaching, could reach the solitary palm. Delightedly, Rita contemplated the infinity of time. Even if the figure moved ever so slowly, she should be waiting there beneath the palm to witness its arrival. Already, she had been there for a period which she was far too indolent to strive to compute—a week, perhaps. She turned her attention to the parrakeets. One of them was moving, and she noted with delight that it had perceived her far below and was endeavoring to draw the attention of its less observant companion to her presence. For many hours she lay watching it and wondering why, since the one bird was so singularly intelligent, its companion was equally dull. When she lowered her eyes and looked out again across the sands, the figure had approached so close as to be recognizable.
 
It was that of Mrs. Sin. Rita appreciated the fitness of her presence, and experienced no surprise, only a mild curiosity. This curiosity was not concerned with Mrs. Sin herself, but with the nature of the burden which she bore upon her head.
 
She was dressed in a manner which Rita dreamily thought would have been inadequate in England, or even in Cuba, but which was appropriate in the Great Sahara. How exquisitely she carried herself, mused the dreamer; no doubt this fine carriage was due in part to her wearing golden shoes with heels like stilts, and in part to her having been trained to bear heavy burdens upon her head. Rita remembered that Sir Lucien had once described to her the elegant deportment of the Arab women, ascribing it to their custom of carrying water-jars in that way.
 
The appearance of the speck on the horizon had marked the height of her trance. Her recognition of Mrs. Sin had signalized the decline of the chandu influence. Now, the intrusion of a definite, uncontorted memory was evidence of returning cerebral activity.
 
Rita had no recollection of the sunset; indeed, she had failed to perceive any change in the form and position of the shadow cast by the foliage. It had spread, an ebony patch, equally about the bole of the tree, so that the sun must have been immediately overhead. But, of course, she had lain watching the parrakeets for several hours, and now night had fallen. The desert mounds were touched with silver, the sky was a nest of diamonds, and the moon cast a shadow of the palm like a bar of ebony right across the prospect to the rim of the sky dome.
 
Mrs. Sin stood before her, one half of her lithe body concealed by this strange black shadow and the other half gleaming in the moonlight so that she resembled a beautiful ivory statue which some iconoclast had cut in two.
 
Placing her burden upon the ground, Mrs. Sin knelt down before Rita and reverently kissed her hand, whispering: “I am your slave, my poppy queen.”
 
She spoke in a strange language, no doubt some African tongue, but one which Rita understood perfectly. Then she laid one hand upon the object which she had carried on her head, and which now proved to be a large lacquered casket covered with Chinese figures and bound by three hoops of gold. It had a very curious shape.
 
“Do you command that the chest be opened?” she asked.
 
“Yes,” answered Rita languidly.
 
Mrs. Sin threw up the lid, and from the interior of the casket which, because of the glare of............