Cororuc's hair bristled at thought of being borne into that forbidding-looking cave. What manner of men were they? In all Britain and Alba, in Cornwall or Ireland, Cororuc had never seen such men. Small dwarfish men, who dwelt in the earth. Cold sweat broke out on the youth's forehead. Surely they were the malevolent dwarfs of whom the Cornish people had spoken, who dwelt in their caverns by day, and by night sallied forth to steal and burn dwellings, even slaying if the opportunity arose! You will hear of them, even today, if you journey in Cornwall. The men, or elves, if such they were, bore him into the cavern, others entering and drawing the boulder back into place. For a moment all was darkness, and then torches began to glow, away off. And at a shout they moved on. Other men of the caves came forward, with the torches. Cororuc looked about him. The torches shed a vague glow over the scene. Sometimes one, sometimes another wall of the cave showed for an instant, and the Briton was vaguely aware that they were covered with paintings, crudely done, yet with a certain skill his own race could not equal. But always the roof remained unseen. Cororuc knew that the seemingly small cavern had merged into a cave of surprizing size. Through the vague light of the torches the strange people moved, came and went, silently, like shadows of the dim past. He felt the cords or thongs that bound his feet loosened. He was lifted upright. "Walk straight ahead," said a voice, speaking the language of his own race, and he felt a spearpoint touch the back of his neck. And straight ahead he walked, feeling his sandals scrape on the stone floor of the cave, until they came to a place where the floor tilted upward. The pitch was steep and the stone was so slippery that Cororuc could not have climbed it alone. But his captors pushed him, and pulled him, and he saw that long, strong vines were strung from somewhere at the top. Those the strange men seized, and bracing their feet against the slippery ascent, went up swiftly. When their feet found level surface again, the cave made a turn, and Cororuc blundered out into a firelit scene that made him gasp. The cave debouched into a cavern so vast as to be almost incredible. The mighty walls swept up into a great arched roof that vanished in the darkness. A level floor lay between, and through it flowed a river; an underground river. From under one wall it flowed to vanish silently under the other. An arched stone bridge, seemingly of natural make, spanned the current. All around the walls of the great cavern, which was roughly circular, were smaller caves, and before each glowed a fire. Higher up were other caves, regularly arranged, tier on tier. Surely human men could not have built such a city.