But the swart leader was a man of courage and he still held his ruffians together. He cursed them fiercely, told them to stand firm, to reload their pistols and to be ready for any danger. Those who still slumbered by the fire were kicked until they awoke, and, with something of a commander's skill, the man drew up his besotted band against the mystic dangers that threatened so closely.
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.
He shuddered. He had never intended to take the leader's life. Five minutes before it occurred he would have said such a thing was impossible. It was merely the powerful impulse of self-protection that had caused him to strike with such deadly effect, and he was sorry. The man, beyond all doubt, was a robber and murderer who had forfeited his life a dozen times, and still he was sorry. It was a tragedy to him to take the life of any one, no matter how evil the fallen might be.
He went back to the house, brought a shovel, one of the numerous ship's stores, and buried the body at once high up the beach where the greatest waves could not reach it and wash it away. He did his task to the rumble of thunder and the flash of lightning, but, when he finished it, dawn came and then the storm that had threatened but that had never burst passed away. He felt, though, that it had not menaced him. To him it was a good storm, kindly and protecting, and giving sufficient help in his purpose that had succeeded so well.