only a momentary advantage; they were too many for him, and ran in again with savage yells.
To his amazement, a dark long swift body flung itself upon his attackers. A great wolf, huge, shaggy, thin and sudden as a torpedo. In vain the men plunged their knives into its rough pelt. Again and again Dale saw the wicked twisted blades drop as the brute caught the wrists of the raiders in its teeth.
The fight was short. Not a man was killed, but none escaped a wound. Some had faces slashed so that blood ran down and blinded them; some dragged a maimed foot; some a mangled arm. In terror of the swift, silent punishing creature that stood between them and their victim, the raiders turned and fled.
The wolf itself had been damaged in the savage encounter; an ear was torn, and it limped as it ran at the heels of the raiders, chasing them to their camels behind the huge rock pile.
The great panting beast looked full at Dale as it passed by. The man felt his heart beat, beat, beat in slow painful thuds against his chest. The creature's yellow, bloodshot eyes turned on him with a glance that cut deeper than any raider's knife. He leaned back. He felt very sick. The vast desert seemed to heave.
Slowly, soberly he made his way back to camp. He did not so much as glance back at the wolf. He knew now. He knew!
Siwa! Actually Siwa at last! The strange fort-like city loomed before the thin line of camels and their dusty weary riders. Like a vast house of cards Siwa had risen up and up from the plain. On its foundation of rock, one generation after another had built; father for son, father for son again; one story on another, the sun-baked mud and salt of its walls almost indistinguishable from the rock itself.
Tiny windows flecked the massive precipitous piles. Vast hives of life, these buildings. Layer upon layer, narrowing from their rocky base into turrets and towers and minarets.
Dale's eyes were for Merle, however. She rode beside him, her face so white and strained, her eyes so anxious that he was torn with doubt. Ought he to have told her Gunnar's secret? He had not turned up since the desert fight. Merle was sick with anxiety. Sheykh El Shabur smiled in his beard as he saw her quivering underlip, her glance that looked about with ever increasing fear.
"Where is he? Where is he?" She turned upon the sheykh. "You said he would be here at Siwa, waiting for us. Where is he?" she demanded.
Dale could have laughed had the situation been less grave and horrible. She loved as she hated, with her whole strong vigorous soul and body. She tackled the sinister, haughty Arab, demanding of him the man she loved, with the fearlessness of untried youth.
She was worth dying for, his little Merle! And it looked as though he, and she too, would make a finish here in this old barbaric city. If he had to go, he would see to it that she was not left behind, to be a sacrifice on some blood-stained ancient altar hewn in the rock beneath the city, to die slowly and horribly that the lust of Melek Taos should be appeased, to die in body—to live on in soul, slave to Sheykh Zura El Shabur.
And Gunnar? It was unnerving to think what might be happening to him. Dale knew that Gunnar had saved his life as surely as that El Shabur had plotted to kill him two nights ago. It was not nice to consider how the cabalist might punish this second interference of his young disciple.
