“But, my dear lieutenant,” expostulated Tarzan, “I am most ready and willing to place myself under command of yourself or any of your sergeants or corporals, and to fight in the ranks as they direct. It is what I came for.”

“I should be glad to think so,” retorted Gernois, with a sneer he made no attempt to disguise. Then shortly: “You are under my orders, and they are that you remain here until we return. Let that end the matter,” and he turned and spurred away at the head of his men. A moment later Tarzan found himself alone in the midst of a desolate mountain fastness.

The sun was hot, so he sought the shelter of a nearby tree, where he tethered his horse, and sat down upon the ground to smoke. Inwardly he swore at Gernois for the trick he had played upon him. A mean little revenge, thought Tarzan, and then suddenly it occurred to him that the man would not be such a fool as to antagonize him through a trivial annoyance of so petty a description. There must be something deeper than this behind it. With the thought he arose and removed his rifle from its boot. He looked to its loads and saw that the magazine was full. Then he inspected his revolver. After this preliminary precaution he scanned the surrounding heights and the mouths of the several gorges—he was determined that he should not be caught napping.

The sun sank lower and lower, yet there was no sign of returning SPAHIS. At last the valley was submerged in shadow Tarzan was too proud to go back to camp until he had given the detachment ample time to return to the valley, which he thought was to have been their rendezvous. With the closing in of night he felt safer from attack, for he was at home in the dark. He knew that none might approach him so cautiously as to elude those alert and sensitive ears of his; then there were his eyes, too, for he could see well at night; and his nose, if they came toward him from up-wind, would apprise him of the approach of an enemy while they were still a great way off.

So he felt that he was in little danger, and thus lulled to a sense of security he fell asleep, with his back against the tree.

He must have slept for several hours, for when he was suddenly awakened by the frightened snorting and plunging of his horse the moon was shining full upon the little valley, and there, not ten paces before him, stood the grim cause of the terror of his mount.

Superb, majestic, his graceful tail extended and quivering, and his two eyes of fire riveted full upon his prey, stood Numa el adrea, the black lion. A little thrill of joy tingled through Tarzan’s nerves. It was like meeting an old friend after years of separation. For a moment he sat rigid to enjoy the magnificent spectacle of this lord of the wilderness.

But now Numa was crouching for the spring. Very slowly Tarzan raised his gun to his shoulder. He had never killed a large animal with a gun in all his life—heretofore he had depended upon his spear, his poisoned arrows, his rope, his knife, or his bare hands. Instinctively he wished that he had his arrows and his knife—he would have felt surer with them.

Numa was lying quite flat upon the ground now, presenting only his head. Tarzan would have preferred to fire a little from one side, for he knew what terrific damage the lion could do if he lived two minutes, or even a minute after he was hit. The horse stood trembling in terror at Tarzan’s back. The ape-man took a cautious step to one side—Numa but followed him with his eyes. Another step he took, and then another. Numa had not moved. Now he could aim at a point between the eye and the ear.

His finger tightened upon the trigger, and as he fired Numa sprang. At the same instant the terrified horse made a last frantic effort to escape—the tether parted, and he went careening down the cañon toward the desert.