But Robert produced a new menace. He was like one inspired that night. The dramatic always appealed to him and his success stimulated him to new histrionic efforts. He had planted in their minds the terror of animals, now he would sow the yet greater terror of human beings, knowing well that man's worst and most dreaded enemy was man. He uttered a deep groan, a penetrating, terrible groan, the wail of a soul condemned to wander between the here and the hereafter, a cry from one who had been murdered, a cry that would doubtless appeal to every one of the ruffians as the cry of his own particular victim. The effect was startling. The men uttered a yell of fright, and started in a panic run for the boats, but the leader threatened them with his leveled pistol and stopped them, although the frightful groan came a second time. "There's nothing in the bush!" Robert heard him say. "There can't be! The place has no people and we know there are no big wild animals on the islands in these seas! It's some freak of the wind playing tricks with us!" He held his men, though they were still frightened, and to encourage them and to prove that no enemy, natural or supernatural, was near, he plunged suddenly into the bushes to see the origin of the terrifying sounds. His action was wholly unexpected, and chance brought him to the very point where Robert was. The lad leaped to his feet and the pirate sprang back aghast, thinking perhaps that he had come face to face with a ghost. Then with a snarl of malignant anger he leveled the pistol that he held in his hand. But Robert struck instantly with his clubbed rifle, and his instinctive impulse was so great that he smote with tremendous force. The man was caught full and fair on the head, and, reeling back from the edge of the bushes in which they stood, fell dead in the open, where all his men could see. It was enough. The demons, the ghosts that haunted them for their crimes, were not very vocal, but they struck with fearful power. They had smitten down the man who tried to keep them on their island, and they were not going to stay one second longer. There was a combined yell of horror, the rush of frightened feet, and, reaching their boats, they rowed with all speed for the schooner, leaving behind them the body of their dead comrade. Robert, awed a little by his own success in demonology, watched until they climbed on board the ship, drawing the boats after them. Then they hoisted the anchor, made sail, and presently he saw the schooner tacking in the wind, obviously intending to leave in all haste that terrible place. She became a ghost ship, a companion to the _Flying Dutchman_, outlined in red by the crimson lightning that still played at swift intervals. Now she turned to the color of blood, and the sea on which she swam was a sea of blood. Robert watched her until at last, a dim, red haze, she passed out of sight. Then he turned and looked at the body of the man whom he had slain.