He came to the great rock that lies in the valley before Opar; with all his men he climbed to the top of it, went into the heart of it, and came out with stones which they threw down into the valley. Afterward they descended from the rock, and picked up the stones again and left the valley there," and Manu pointed toward the northeast with one of his hairy little fingers.

"How do you know it was Tarzan of the Apes?" asked La.

"Does Manu not know his cousin and his friend?" demanded the monkey. "With my eyes I saw him--it was Tarzan of the Apes."

La of Opar puckered her brows in thought. Deep in her heart smoldered the tires of her great love for Tarzan. Fires that had been quenched by the necessity that had compelled her marriage with Cadj since last she had seen the ape-man. For it is written among the laws of Opar that the High Priestess of the Flaming God must take a mate within a certain number of years after her consecration. For many moons had La longed to make Tarzan that mate. The ape-man had not loved her, and finally she had come to a realization that he could never love her. Afterward she had bowed to the frightful fate that had placed her in the arms of Cadj.

As month after month had passed and Tarzan bad not returned to Opar, as he had promised he would do, to see that no harm befell La, she had come to accept the opinion of Cadj that the ape-man was dead, and though she hated the repulsive Cadj none the less, her love for Tarzan had gradually become little more than a sorrowful memory. Now to learn that he was alive and had been so near was like re-opening an old wound. At first she comprehended little else than that Tarzan had been close to Opar, but presently the cries of Manu aroused her to a realization that the ape-man was in danger--just what the danger was, she did not know.

"Who has gone to kill Tarzan of the Apes? she demanded suddenly.

"Cadj, Cadj!" shrieked Manu. "He has gone with many, many men, and is following upon the spoor of Tarzan."

La sprang quickly from the pool, seized her girdle and ornaments from her attendant and adjusting them hurriedly, sped through the garden and into the temple.

Chapter VII. "YOU MUST SACRIFICE HIM"

Warily Cadj and his hundred frightful followers, armed with their bludgeons and knives, crept stealthily down the face of the barrier into the valley below, upon the trail of the white man and his black companions. They made no haste, for they had noted from the summit of Opar's outer wall, that the party they were pursuing moved very slowly, though why, they did not know, for they had been at too great a distance to see the burden that each of the blacks carried. Nor was it Cadj's desire to overtake his quarry by daylight, his plans contemplating a stealthy night attack, the suddenness of which, together with the great number of his followers, might easily confuse and overwhelm a sleeping camp.

The spoor they followed was well marked. There could be no mistaking it, and they moved slowly down the now gentle declivity, toward the bottom of the valley. It was close to noon that they were brought to a sudden halt by the discovery of a thorn boma recently constructed in a small clearing just ahead of them. From the center of the boma arose the thin smoke of a dying fire. Here, then, was the camp of the ape-man.

Cadj drew his followers into the concealment of the thick bushes that ordered the trail, and from there he sent ahead a single man to reconnoiter. It was but a few moments later that the latter returned to say that the camp was deserted, and once again Cadj moved forward with his men. Entering the boma they examined it in an effort to estimate the size of the party that accompanied Tarzan. As they were thus occupied Cadj saw something lying half concealed by bushes at the far end of the boma. Very warily he approached it, for there was that about it which not only aroused his curiosity but prompted him to caution, for it resembled indistinctly the figure of a man, lying huddled upon the ground.

With ready bludgeons a dozen of them approached the thing that had aroused Cadj's curiosity, and when they had come close to it they saw lying before them the lifeless figure of Tarzan of the Apes.

"The Flaming God has reached forth to avenge his desecrated altar," cried the High Priest, his eyes glowing with the maniacal fires of fanaticism.

But another priest, more practical, perhaps, or at least more cautious, kneeled beside the figure of the ape-man and placed his ear against the latter's heart.

"He is not dead," he whispered; "perhaps he only sleeps."

"Seize him, then, quickly," cried Cadj, and an instant later Tarzan's body was covered by the hairy forms of as many of the frightful men as could pile upon him. He offered no resistance--he did not even open his eyes, and presently his arms were securely bound behind him.

"Drag him forth where the eye of the Flaming God may rest upon him," cried Cadj. They dragged Tarzan out into the center of the boma into the full light of the sun, and Cadj, the High Priest, drawing his knife from his loin cloth, raised it above his head and stood over the prostrate form of his intended victim. Cadj's followers formed a rough circle about the ape-man and some of them pressed close behind their leader. They appeared uneasy, looking alternately at Tarzan and their High Priest, and then casting furtive glances at the sun, riding high in a cloud- mottled sky. But whatever the thoughts that troubled their half-savage brains, there was only one who dared voice his, and he was the same priest who, upon the preceding day, had questioned Cadj's proposal to slay the ape-man.

"Cadj," he said now, "who are you to offer up a sacrifice to the Flaming God? It is the privilege alone of La, our High Priestess and our queen, and indeed will she be angry when she learns what you have done."

"Silence, Dooth!" cried Cadj; "I, Cadj, am the High Priest of Opar. I, Cadj, am the mate of La, the queen. My word, too, is law in Opar.