Chet tore his fascinated eyes from the revolting features of that purple face; he forced himself to look beyond at what else might be on this sacrificial stone. And, as he saw the assortment of fruit that was there on a green mat of leaves, the surprise was even greater than would have followed a repetition of the first discovery. A naked, murdered man!--and ripe fruit! What was the meaning of this? Chet asked himself a score of questions and found the answer to none. But one thing he knew now beyond a doubt: Herr Professor Kreiss had been wrong. This was truly an altar for the performance of unknown and savage rites, and the altar itself and the whole encircling arena had been created by some intelligence. People--things--embodied intelligences of some sort had carved these stones. Chet was oppressed by a feeling of impending danger. His thoughts came back sharply to the things on the stone: the absurdly contrasting exhibits: a naked body and fruit! But were they so different? he asked himself, and knew in the same instant that they were not. They were one and the same; they differed only in kind. They were both food! * * * * * From the darkness beyond came a shuffling of feet. From the black passage someone was coming--drawing near to the portal--and coming slowly, steadily through the dark. The pad of animal feet would have been unnerving--or the stealthy footfalls of an approaching savage--but this was neither; it was a scuffing, shuffling sound. The sweat stood out in beads on Chet's forehead and a trickle of it reached his eyes. He dashed it away with the back of his hand while he drew silently into the shadow of the overhanging stone. He held his breath as he watched in the darkness. His pistol came noiselessly from his belt. Yet, how could he fire it? he asked himself in a moment of frantic planning. Only seven cartridges left!--they would need them all; and to fire now would bring more enemies upon them. He returned the gun to his belt and stooped to weigh a fragment of stone in his hand: this must serve him as a weapon. The dragging footsteps were near, where the passage mouth loomed black. The light of a distant Earth, struck slantingly across to leave this face of the pyramid in half-darkness. From that far and peaceful world the light poured floodingly down; it shone in under the projecting capstone; it struck upon the raised altar and revealed in ghastliest detail the gruesome offering there. And surely the strangest sight of all that that Earth-light disclosed was when it shone golden upon a black and hairy body of a beast that was half man, half ape. The creature moved slowly forward, walking erect, with its furry arms stretched gropingly ahead. In the full light it went shuffling on like one who is blind or who walks in the dark, until it stopped before the altar stone and stood rigidly waiting. * * * * *