beautiful in the luxuriousness and arrangement of its group of palms and leafy bushes. Some pigeons were cooing softly, hidden from sight amongst the trees, with a plaintive melancholy that somehow seemed in keeping with the deserted spot. Beside the well, forming a triangle, stood what had been three particularly fine palm trees, but the tops had been broken off about twenty feet up from the ground, and the mutilated trunks reared themselves bare and desolate-looking. Diana took off her heavy helmet and tossed it to the man behind her, and sat looking at the oasis, while the faint breeze that had sprung up stirred her thick, short hair, and cooled her hot head. The sad notes of the pigeons and the broken palms, that with their unusualness vaguely suggested a tragedy, lent an air of mystery to the place that pleased her.
She turned eagerly to Mustafa Ali. "Why did you not arrange for the camp to be here? It would have been a long enough ride."
The man fidgeted in his saddle, fingering his beard uneasily, his eyes wandering past Diana's and looking at the broken trees. "No man rests here, Mademoiselle. It is the place of devils. The curse of Allah is upon it," he muttered, touching his horse with his heel, and making it sidle restlessly—an obvious hint that Diana ignored.
"I like it," she persisted obstinately.
He made a quick gesture with his fingers. "It is accursed. Death lurks beside those broken palm trees," he said, looking at her curiously.
She jerked her head with a sudden smile. "For you, perhaps, but not for me. Allah's curse rests only upon those who fear it. But since you are afraid, Mustafa Ali, let us go on." She gave a little light laugh, and Mustafa Ali kicked his horse savagely as he followed.
The distance before her spread out cleanly with the sharp distinctness that precedes the setting sun. She rode on until she began to wonder if it would indeed be night-fall before she reached her destination. They had ridden longer and faster than had ever been intended. It seemed odd that they had not overtaken the baggage camels. She looked at her watch with a frown. "Where is your caravan, Mustafa Ali?" she called. "I see no sign of an oasis, and the darkness will come."
"If Mademoiselle had started earlier——" he said sullenly.
"If I had started earlier it would still have been too far. To-morrow we will arrange it otherwise," she said firmly.
"To-morrow——" he growled indistinctly.
Diana looked at him keenly. "What did you say?" she asked haughtily.
His hand went to his forehead mechanically. "To-morrow is with Allah!" he murmured with unctuous piety.
A retort trembled on Diana's lips, but her attention was distracted from her annoying guide to a collection of black specks far off across the desert. They were too far away for her to see clearly, but she pointed to them, peering at them intently. "See!" she cried. "Is that the caravan?"
"As Allah wills!" he replied more piously than before, and Diana wished, with a sudden feeling of irritation, that he would stop relegating his responsibilities to the Deity and take a little more active personal interest in his missing camel train.
The black specks were moving fast across the level plain. Very soon Diana saw that it was not the slow, leisurely camels that they were overtaking, but a band of mounted men who were moving swiftly towards them. They had seen nobody since the traders' caravan had passed them in the morning. For Diana the Arabs that were approaching were even more interesting than the caravan had been. She had seen plenty of caravans arriving and departing from Biskra, but, though she had seen small parties of tribesmen constantly in the vicinity of the town, she had never seen so large a body of mounted men before, nor had she seen them as they were here, one with the wild picturesqueness of their surroundings. It was impossible to count how many there were, for they were riding in close formation, the wind filling their great white cloaks, making each man look gigantic. Diana's interest flamed up excitedly. It was like passing another ship upon a hitherto empty sea. They seemed to add a desired touch to the grim loneliness of the scene that had begun to be a little awe-inspiring. Perhaps she was hungry, perhaps she was tired, or perhaps she was only annoyed by the bad arrangements of her guide, but before the advent of the mounted Arabs Diana had been conscious of a feeling of oppression, as if the silent desolation of the desert was weighing heavily upon her, but the body of swiftly moving men and horses had changed the aspect utterly. An atmosphere of life and purpose seemed to have taken the place of the quiet stagnation that had been before their coming.
The distance between the two parties decreased rapidly. Diana, intent on the quickly advancing horsemen, spurred ahead of her guide with sparkling eyes. They were near enough now to see that the horses were beautiful creatures and that each man rode magnificently. They were armed too, their rifles being held in front of them, not slung on their backs as she had seen in Biskra. They passed quite close to her, only a few yards away—a solid square, the orderly ranks suggesting training and discipline that she had not looked for. Not a head turned in her direction as they went by and the pace was not slackened. Fretted by the proximity of the galloping horses, her own horse reared impatiently, but Diana pulled him in, turning in her saddle to watch the Arabs pass, her breath coming quick with excitement.
"What are they?" she called out to Mustafa Ali, who had dropped some way behind her. But he, too, was looking back at the horsemen, and did not seem to hear her question. Her escort had lagged still further behind her guide and were some distance away. Diana watched the rapidly moving, compact square eagerly with appreciatory eyes—it was a beautiful sight. Then she gave a little gasp. The galloping horses had drawn level with the last stragglers of her own party, and just beyond they stopped suddenly. Diana would not have believed it possible that they could have stopped so suddenly and in such close formation while travelling at such a pace. The tremendous strain on the bridles flung the horses far back on their haunches. But there was no time to dwell on the wonderful horsemanship or training of the men. Events moved too rapidly. The solid square split up and lengthened out into a long line of two men riding abreast. Wheeling behind the last of Mustafa's men they came back even faster than they had passed, and circled widely round Diana and her attendants. Bewildered by this manoeuvre she watched them with a puzzled frown, striving to soothe her horse, who was nearly frantic with excitement. Twice they galloped round her little band, their long cloaks fluttering, their rifles tossing in their hands. Diana was growing impatient. It was very fine to watch, but time and the light were both going. She would have been glad if the demonstration had occurred earlier in the day, when there would have been more time to enjoy it. She turned again to Mustafa Ali to suggest that they had better try to move on, but he had gone further from her, back towards his own. She wrestled with her nervous mount, trying to turn him to join her guide, when a sudden burst of rifle shots made her start and her horse bound violently. Then she laughed. That would be the end of the demonstration, a parting salute, the decharge de mousqueterie beloved of the Arab. She turned her head from her refractory horse to look at them ride off, and the laugh died away on her lips. It was not a farewell salute. The rifles that the Arabs were firing were not pointing up into the heavens, but aiming straight at her and her escort. And as she stared with suddenly startled eyes, unable to do anything with her plunging horse, Mustafa Ali's men were blotted out from her sight, cut off by a band of Arabs who rode between her and them. Mustafa Ali himself was lying forward on the neck of his horse, who was standing quiet amidst the general confusion. Then there came another volley, and the guide slid slowly out of his saddle on to the ground, and at the same time Diana's horse went off with a wild leap that nearly unseated her.
Until they started shooting the thought that the Arabs could be hostile had not crossed her mind. She imagined that they were merely showing off with the childish love of display which she knew was characteristic. The French authorities had been right after all. Diana's first feeling was one of contempt for an administration that made possible such an attempt so near civilisation. Her second a fleeting amusement at the thought of how Aubrey would jeer. But her amusement passed as the real seriousness of the attack came home to her. For the first time it occurred to her that her guide's descent from his saddle was due to a wound and not to the fear that she had at first disgustedly attributed to him. But nobody had seemed to put up any kind of a fight, she thought wrathfully. She tugged angrily at her horse's mouth, but the bit was between his teeth and he tore on frantically. Her own position