From the shadows of the trees came a file of black men and women, young, naked except for a mantle of monkey-skins and parrot-feathers thrown over the shoulders of each. More regalia brought by John De Albor, undoubtedly. They formed a semicircle at a safe distance from the chained brute, and sank to their knees, bending their heads to the ground before him. Thrice this motion was repeated. Then, rising, they formed two lines, men and women facing one another, and began to dance; at least it might by courtesy be called a dance. They hardly moved their feet at all, but all other parts of their bodies were in constant motion, twisting, rotating, writhing. The measured, rhythmical movements had no connection at all with the voodoo dances McGrath had witnessed. This dance was disquietingly archaic in its suggestion, though even more depraved and bestial--naked primitive passions framed in a cynical debauchery of motion. No sound came from the dancers, or from the votaries squatting about the ring of trees. But the ape, apparently infuriated by the continued movements, lifted his head and sent into the night the frightful shriek McGrath had heard once before that day--he had heard it in the hills that border black Zambebwei. The brute plunged to the end of his heavy chain, foaming and gnashing his fangs, and the dancers fled like spume blown before a gust of wind. They scattered in all directions--and then McGrath started up in his covert, barely stifling a cry. From the deep shadows had come a figure, gleaming tawnily in contrast to the black forms about it. It was John De Albor, naked except for a mantle of bright feathers, and on his head a circlet of gold that might have been forged in Atlantis. In his hand he bore a gold wand that was the scepter of the high priests of Zambebwei. Behind him came a pitiful figure, at the sight of which the moon-lit forest reeled to McGrath's sight. Constance had been drugged. Her face was that of a sleep-walker; she seemed not aware of her peril, or the fact that she was naked. She walked like a robot, mechanically responding to the urge of the cord tied about her white neck. The other end of that cord was in John De Albor's hand, and he half led, half dragged her toward the horror that squatted in the center of the glade. De Albor's face was ashy in the moonlight that now flooded the glade with molten silver. Sweat beaded his skin. His eyes gleamed with fear and ruthless determination. And in a staggering instant McGrath knew that the man had failed, that he had been unable to save Constance, and that now, to save his own life from his suspicious followers, he himself was dragging the girl to the gory sacrifice.