He felt better after this and went in; but that night the excitement of the adventure and the effects of his immersion were sufficient to keep him awake hour after hour, while when he dropped off into an uneasy slumber it was for his mind to be haunted by dreams in which he was being dragged down into the depths of the sea by a strange monster that clung to his limbs and writhed about him, making him shudder as he felt the chilling embrace.