“When prayer is ended disperse yourselves through the land as ye list,” he murmured, with a flippant laugh at the perverted quotation. “The holy man will preach till our tongues blacken with thirst.” And he turned to his brother to urge him to give the order to remount. Omar was leaning against his horse, his tall figure sagging with fatigue. He started violently as Saïd spoke to him, and, staggering, would have fallen but for the strong arm slipped round him. And, watching Craven saw with dismay a dark stain mar the whiteness of his robes where a wound had broken out afresh, and he wondered whether the weakened body would be able to respond to the urging of the resolute will that drove it mercilessly, or, when almost within view, the fiercely longed for revenge would yet be snatched from him.

But with an effort the Arab pulled himself together and, mounting, painfully cut short the Mullah's eloquence and gave in a firm tone the desired order.

The swift gallop southward was resumed.

The breeze dropped gradually and finally died away, but for an hour or more the refreshing coolness lingered. Then as the sun rose higher and gained in strength the air grew steadily warmer until the heat became intense and Craven began to look eagerly for the oasis that was to be their first halting place. In full daylight the landscape that by night had seemed to possess an eerie charm developed a dull monotony. The successive rise and fall of the land, always with its limited outlook, became tedious, and the labyrinthine hillocks with their intricate windings seemed to enclose them inextricably. But on reaching the summit of a longer steeper incline that had perceptibly slowed the galloping horses, he saw spread out before him a level tract of country stretching far into the distance, with a faint blue smudge beyond of the chain of hills that Saïd told him marked the boundary of the territory that Mukair Ibn Zarrarah regarded as his own, the boundary, too, of French jurisdiction. Through a defile in the hills lay the enemy country.

The change was welcome to men and horses alike, the latter—aware with unerring instinct of the nearness of water—of their own accord increased their pace and thundering down the last long shifting slope pressed forward eagerly toward the oasis that Craven judged to be between two and three miles away. In the clear deceptive atmosphere it appeared much nearer, and yet as they raced onward it seemed to come no closer but rather to recede as though some malevolent demon of the desert in wanton sport was conjuring it tantalizingly further and further from them. The tall feathery palms, seen through the shimmering heat haze, took an exaggerated height towering fantastically above the scrub of bushy thorn trees.

Craven had even a moment's doubt whether the mirage-like oasis actually existed or was merely a delusion bred of fancy and desire. But the absurdity of the doubt came home to him as he looked again at the outline of the distant hills—too conspicuous a landmark to allow of any error on the part of his companions to whom the country was familiar.

The prospect of the welcome shade made him more sensitive to the scorching strength of the sun that up till now he had endured without more than a passing sensation of discomfort. He was inured to heat, but to-day's heat was extraordinary, and even the Arabs were beginning to show signs of distress. It was many hours since they started and the pace had been killing. His mouth was parched and his eyeballs smarted with the blinding glare. With the thirst that increased each moment the last half mile seemed longer than all the preceding ride, and when the oasis was at length reached he slipped from his sweating horse with an exclamation of relief.

The Arabs crowded round the well and in a moment the little peaceful spot was the scene of noisy confusion; men shouting, scrambling and gesticulating, horses squealing, and above all the creaking whine of the tackling over the well droning mournfully as the bucket rose and fell. Saïd swung himself easily to the ground and held his brother's plunging horse while he dismounted. For a few moments they conversed together in a rapid undertone, and then the younger man turned to Craven, a cloud on his handsome face. “Our communication has broken down. Two scouts should have met us here,” he said, with a hint of anxiety in his voice. “It disconcerts our scheme for we counted on their report. They may be late—it is hardly likely. They had ample time. More probably they have been ambushed—the country is filled with spies—in which event the advantage lies with the other side. They will know that we have started, while we shall have no further information. The two men who are missing were the only ones operating beyond the border. The last scout who reported himself was in touch with them last night. From them he learned that two days ago the enemy were forty miles south of the hills yonder. We had hoped to catch them unawares, but they may have got wind of our intentions and be nearer than we expect. The curse of Allah on them!” he added impatiently.

“What are you going to do?” asked Craven with a backward glance at the dismounted tribesmen clustering round the well and busily employed in making preparations for rest and food. Saïd beckoned to a passing Arab and dispatched him with a hurried order. Then he turned again to Craven. “The horses must rest though the men would go forward at a word. I am sending two scouts to reconnoitre the defile and bring back what information they can,” he said. And as he spoke the two men he had sent for appeared with disciplined promptness and reined in beside him. Having received their brief instructions they started off in a cloud of dust and sand at the usual headlong gallop. Saïd turned away immediately and disappeared among the jostling crowd, but Craven lingered at the edge of the oasis looking after the fast receding horsemen who, crouched low in their saddles, their long white cloaks swelling round them, were very literally carrying out their orders to ride “swift as the messengers of Azrael.” He had known them both on his previous visits, though he had not recognised them in the dark hours of the dawn when they joined the troop, and remembered them as two of the most dare-devil and intrepid of Mukair Ibn Zarrarah's followers. A moment since they had grinned at him in cheery greeting, exhibiting almost childlike pleasure when he had called them by name, and had set off with an obeisance as deep to him as to their leader.

Incidents of those earlier visits flashed through his mind as he watched them speeding across the glaring plain and a feeling almost of regret came to him that it should be these two particular men who had been selected for the hazardous mission. For he guessed that their chance of return was slight. And yet hardly slighter than for the rest of them! With a shrug he moved away slowly and sought the shadow of a camel thorn. He lay on his back in the welcome patch of shade, his helmet tilted over his eyes, drawing vigorously at a cigarette in the vain hope of lessening the attentions of the swarms of tormenting flies that buzzed about him, and waiting patiently for the desired water before he swallowed the dark brown unsavoury mass of crushed dates which, warm from his pocket and gritty with the sand that penetrated everything, was the only food available. Saïd was still busy among the throng of men and horses, but near him Omar sat plunged in gloomy silence, his melancholy eyes fixed on the distant hills. He had re-adjusted his robes, screening the ominous stain that revealed what he wished to hide. His hands, which alone might have betrayed the emotion surging under his outward passivity, were concealed in the folds of his enveloping burnous. When the immediate wants of men and horses were assuaged the prevailing clamour gave place to sudden quiet as the Arabs lay down and, muffling their heads in their cloaks, seemed to fall instantly asleep. His supervision ended, Saïd reappeared, and following the example of his men was soon snoring peacefully. Craven rolled over on his side, and lighting another cigarette settled himself more comfortably on the warm ground. For a time he watched the solitary sentinel sitting motionless on his horse at no great distance from the oasis. Then a vulture winging its slow heavy way across the heavens claimed his attention and he followed it with his eyes until it passed beyond his vision. He was too lazy and too comfortable to turn his head. He lay listening to the shrill hum of countless insect life, smoking cigarette after cigarette till the ground around him was littered with stubs and match ends. The hours passed slowly. When he looked at the guard again the Arab was varying the monotony by walking his horse to and fro, but he had not moved further into the desert. And suddenly as Craven watched him he wheeled and galloped back toward the camp. Craven started up on his arm, screening his eyes from the sun and staring intently in the direction of the hills. But there was nothing to be seen in the wide empty plain, and he sank down again with a smile at his own impatience as the reason of the man's return occurred to him. Reaching the oasis the Arab led his horse among the prostrate sleepers and kicked a comrade into wakefulness to take his place. From time to time the intense stillness was broken by a movement among the horses, and once or twice a vicious scream came from a stallion resenting the attentions of a restless neighbour. The slumbering Arabs lay like sheeted figures of the dead save when some uneasy dreamer rolled over with a smothered grunt into a different position. Craven had begun to wonder how much longer the siesta would be protracted when Omar rose stiffly, and going to his brother's side awoke him with a hand on his shoulder. Saïd sat up blinking sleepily and then leaped alertly to his feet. In a few minutes the oasis was once more filled with noisy activity. But this time there was no confusion. The men mounted quickly and the troop was reformed with the utmost dispatch. The horses broke almost immediately into the long swinging gallop that seemed to eat up the miles under their feet.