The fiercest heat of the day was passed. The haze that had hung shimmering over the plain had cleared away and the hills they were steadily nearing grew more clearly defined. Soon the conformation of the range was easily discernible, the rocky surface breaking up into innumerable gullies and ravines, the jagged ridges standing out clean against the deep blue of the sky. Another mile and Saïd turned to him with outstretched hand, pointing eagerly. “See, to the right, there, by that shaft of rock that looks like a minaret, is the entrance to the defile. It is well masked. It comes upon one suddenly. A stranger would hardly find the opening until he was close upon it. In the dawn when the shadows are black I have ridden past it myself once or twice and had to—Allah! Selim—and alone!” he cried suddenly, and shot ahead of his companions. The troop halted at Omar's shouted command, but Craven galloped after his friend. He had caught sight of the horseman emerging from the pass a moment after Saïd had seen him and the same thought had leaped to the mind of each—the news on which so much depended might still never reach them. The spy came on toward them slowly, his horse reeling under him, and man and beast alike were nearly shot to pieces. As Saïd drew alongside of them the wounded horse collapsed and the dying man fell with him, unable to extricate himself. In a flash the Arab Chief was on his feet, and with a tremendous effort pulled the dead animal clear of his follower's crushed and quivering limbs. Slipping an arm about him he raised him gently, and bending low to catch the faint words he could scarcely hear, held him until the fluttering whisper trailed into silence, and with a convulsive shudder the man died in his arms.

Laying the corpse back on the sand he wiped his blood-stained hands on the folds of his cloak, then swung into the saddle again and turned to Craven, his eyes blazing with anger and excitement. “They were trapped in the defile—ten against two—but Selim got through somehow to make his reconnaissance, and they finished him off on the way back—though I don't think he left many behind him! Either our plans have been betrayed—or it may be merely a coincidence. Whichever it is they are waiting for us yonder, on the other side of the hills. They have saved us a day's journey—at the very least,” he added with a short laugh that was full of eager anticipation.

They waited until Omar and the troop joined them, and after a short consultation with the headmen it was decided to press forward without delay. Aware that but few hours of daylight remained, Craven deemed it a foolhardy decision, but Omar was deeply stirred at the nearness of the man who had wronged him—for Selim had managed to extract that information from one of his opponents before killing him—and the tribesmen were eager for immediate action. The horses, too, were fresh enough, thanks to the mid-day rest. The troop moved on again, a guard of fifty picked men slightly in advance of the main body.

At the foot of the hills they drew rein to reform for the defile only admitted of three horses walking abreast, and as Craven waited for his own turn to come to enter the narrow pass he looked curiously at the bare rock face that rose almost perpendicularly out of the sand and towered starkly above him. But he had no time for a lengthy inspection, and in a few minutes, with Omar and Saïd on either hand, he guided his horse round the jutting spur of rock that masked the opening and rode into the sombre shade of the defile. The change was startling, and he shivered with the sudden chill that seemed so much cooler by contrast with the heat of the plain. Hemmed in by sheer sinister looking cliffs, which were broken at intervals by lateral ravines, the tortuous track led over rough slippery ground sprinkled with huge boulders that made any pace beyond a walk impossible. The horses stumbled continually and the necessity of keeping a sharp look-out for each succeeding obstacle drove from Craven's mind everything but the matter in hand. He forgot to wonder how near or how far from the other side of the hills lay the opposing force, or whether they would have time to reform before being attacked or be picked off by waiting marksmen as they emerged from the pass without any possibility of putting up a fight. For himself it didn't after all very much matter one way or the other, but it would be hard luck, he reflected, if Omar did not get a chance at the renegade and Saïd was shot before the encounter he was aching for—and broke off to swear at his horse, which had stumbled badly for the sixth time.

Omar was riding a pace or two in advance, bending forward in the saddle and occasionally swaying as if from weakness, his burning eyes filled with an almost mystical light as if he saw some vision that, hidden from the others, was revealed to him alone. The dark stain on his robe had spread beyond concealment and he had not spoken since they entered the defile. To Craven, who had never before traversed it, the pass was baffling. He did not know its extent and he had no idea of the depth of the hills. But soon a growing excitement on the part of Saïd made him aware that the exit must be near and the continued silence argued that the vanguard had got through unmolested. He slipped the button of his holster and freed his revolver from the silk handkerchief in which Yoshio had wrapped it.

A sharp turn to the right revealed the scene of the ambuscade, where in one of the lateral openings Selim and his companion had been trapped. The bodies of men and horses had been pulled clear of the track by the advance guard as they went by a few minutes earlier. The old sheik's horse showed the utmost repugnance to the grim pile of corpses, snorting and rearing dangerously, and Craven wrestled with him for some moments before he bounded suddenly past them with a clatter of hoofs that sent the loose stones flying in all directions.

Another turn to the right, an equally sharp bend to the left, where the track widened considerably, and they debouched abruptly into open desert.

The vanguard was drawn up in order and their leader spurred to Omar's side in eager haste to communicate what was patent to the eyes of all. A little ripple of excitement went through Craven as he saw the dense body of horsemen, still about two miles away, who were galloping steadily towards them. It had come then. With a curious smile he bent forward and patted the neck of his fretting horse, which was fidgeting badly. The opposing force appeared to outnumber them considerably, but he knew from Saïd that Mukair Ibn Zarrarah's men were better equipped and better trained. It would be skill against brute force, though it yet remained to be seen how far Omar's men would respond to their training when put to the test. Would they be able to control their own headstrong inclinations or would their zeal carry them away in defiance of carefully rehearsed orders?

Word of the near presence of the enemy had been sent back to those who were still moving up the pass, and so far discipline was holding good. The men were pouring out from the yawning mouth of the file in a steady stream, the horses crowded together as closely as possible, and as each detachment arrived it reformed smartly under its own headman.

Watching the rapid approach of the hostile tribe, Craven wondered whether there would be time for their own force to reassemble to enable them to carry out the agreed tactics.