Her shaking fingers found the handkerchief for which they were groping, and she wiped the moisture that had gathered on the palms of her hands.
"When I am missed–" she began desperately, trying to keep a bold front, but her assurance was leaving her.
"You will not be missed for so long that it will be too late," he replied drily.
"Too late! What do you mean?" she gasped.
"Your own plans will stop any possibility of inquiry for some time to come." He paused, and behind her, Diana heard him strike another match. The banal little incident nearly snapped her nerves that were stretched to breaking-point. She put her hands to her head to try and stop the throbbing in her temples.
"You engaged a caravan in charge of Mustafa Ali," he went on evenly, "to travel in the desert for a month. You set out from Biskra, but your intention was at the end of the time to travel northward to Oran and there dismiss the caravan. From there you were to cross to Marseilles, then to Cherbourg, where you would embark for America to follow your brother, who has already started."
She listened breathlessly with an ever-increasing fear growing in her eyes. The slow, casual voice detailing her itinerary with the quiet certainty of perfect knowledge filled her with a terror that made her want to scream. She swayed a little as she stood, her eyes fixed on the endless strip of desert and gold-flecked sky visible through the opening of the tent, but she saw nothing of the undulating sand, nor the red glory of the setting sun.
"How do you know—all—this?" she whispered with dry lips that trembled.
"I wished to know. It was quite simple." The answer was given carelessly, and again the thin thread of smoke drifted across her face.
Her anger flamed up again. "Is it money that you want? Are you holding me for ransom?" But her scornful voice faltered and died away on the last word, and it did not need his silence to convince her that it was no question of ransom. She had only spoken to try and stifle the inner conviction that grew despite her efforts to crush it. Her hands were locked together tightly, her eyes still staring out unseeing at the wonderful sunset. She felt dazed, hopeless, like a fugitive who has turned into a cul-de-sac, hemmed in on every side; there seemed no way out, no loophole of escape. She wrung her hands convulsively and a great shudder shook her. Then in her despair a faint ray of hope came.
"Mustafa Ali, or one of the caravan men may have given the alarm already in Biskra—if you have not—murdered them all," she whispered jerkily.
"I have not murdered them all," he rejoined shortly, "but Mustafa Ali will not give any alarm in Biskra."
"Why?" She tried to keep silent, but the question was forced from her, and she waited tense for his answer. Tales of ruthless Arab cruelty surged through her mind. What had been the fate of the unfortunate caravan leader? Her eyes closed and her throat grew dry.
"There was no need for any murder," he continued sarcastically. "When you come to know me better you will realise that I do not leave too much to chance. 'All things are with Allah, blessed be his name.' Good! But it is well to remember that Allah does not always concern himself with the affairs of men, and arrange accordingly. If I had left this affair to chance there might very easily have been, as you suggest, murder done—though we do not call it murder in the desert. It was very simple. Voyons! You paid Mustafa Ali well to guide you in the desert. I paid him better to lead you to me. I paid him well enough to make him content to remove himself from Biskra, where awkward questions might be asked, to another sphere of usefulness where he is not known, and where he can build up for himself a new reputation as a caravan leader."
There was another silence and her hands went groping to her throat. It had been no chance affair then—no accidental meeting that the Arab chief had turned to his own account, but an organised outrage that had been carefully planned from the beginning. From the very outset she had been a dupe. She ground her teeth with rage. Her suave, subservient guide had been leading her the whole time, not in the direction that had been mapped out in Biskra, but towards the man who had bought him to betray his trust. Mustafa Ali's shifting eyes, his desire to hurry her from the oasis where they had rested at mid-day, his tone were all explained. He had acted well. The last touch—the imaginary wound that had toppled him slowly out of his saddle had been a masterpiece, she reflected bitterly. Nothing had been omitted to make the attempt a success. The horse that had been given her to ride was the Sheik's beyond all doubt, trained to his whistle. Even her revolver had been tampered with. She had not missed, as she had thought. She remembered the noise, the fleeting vision she had had in the hotel at Biskra. It had been some one in her room, Mustafa Ali himself, or one of his men, who had stolen in and substituted the blank cartridges. The possibility of Aubrey changing his mind and accompanying her must also have been thought of, for the Sheik had provided against the resistance that would certainly have then been made by the number of followers he had brought with him—a large enough force to frustrate easily any attempted opposition to the attack.
The net that she had felt closing round her earlier in the afternoon seemed wrapped round her now inextricably, drawing tighter and tighter, smothering her. She gasped for breath. The sinking sun seemed suddenly to leap up wildly into the heavens; then she pulled herself together with a tremendous effort. "Why have you done this?" she murmured faintly.
Then for a moment her heart stood still, her eyes dilating. He had come close behind her, and she waited in an agony, until he caught her to him, crushing her against him, forcing her head back on his arm.
"Because I wanted you. Because one day in Biskra, four weeks ago, I saw you for a few moments, long enough to know that I wanted you. And what I want I take. You played into my hands. You arranged a tour in the desert. The rest was easy."
Her eyes were shut, the long dark lashes quivering on her pale cheeks so that she could not see his face, but she felt him draw her closer to him and then his fierce kisses on her mouth. She struggled frantically, but she was helpless, and he laughed softly as he kissed her lips, her hair, her eyes passionately. He stood quite still, but she felt the heavy beating of his heart under her cheek, and understood dimly the passion that she had aroused in him. She had experienced his tremendous strength. She realised from what he had told her that he recognised no law beyond his own wishes, and was prepared to go to any lengths to fulfil them. She knew that her life was in his hands, that he could break her with his lean brown fingers like a toy is broken, and all at once she felt pitifully weak and frightened. She was utterly in his power and at his mercy—the mercy of an Arab who was merciless.
She gave in suddenly, lying quiet in his arms. She had touched the lowest depths of degradation; he could do nothing more to her than he had done. For the moment she could fight no further, she was worn out and utterly weary. A numb feeling of despair came over her and with it a sense of unreality, as if it were a hideous nightmare from which she would wake, for the truth seemed too impossible, the setting too theatrical. The man himself was a mystery. She could not reconcile him and the barbaric display in which he lived with the evidences of refinement and education that the well-worn books in the tent evinced. The fastidious ordering of his appointments puzzled her; it was strange to find in such a place. A dozen incongruities that she had noticed during the day crowded into her recollection until her head reeled. She turned from them wearily; she was too tired to think, too spent in mind and body. And with the despair a kind of indifference stole over her. She had suffered so much that nothing more mattered.