It may have been that at first my eyes were not accustomed to the greater darkness, and that presently, with expanding pupils, I began to see. That, of course. But now I was aware of that sheen of light, inherent to the rocks of this strange little world. A vaguely luminous, opalescent sheen which grew in intensity as we advanced so that it illumined the darkness with a weird, beautiful glitter. I saw now that we were advancing into a widening tunnel. Already it was some fifty feet wide, with lifting ceiling so that presently I could only dimly see it, far up as it glistened in the opalescent light. Moisture was up there--a myriad tiny drops, glittering like opalescent gems in the eerie glow. Occasionally one would drop and hit my face. Steadily the jabbering little crowd, with excited guttural voices, pushed forward. I had the feeling at first that we were descending; this winding, broadening tunnel going downward at an ever increasing angle. Then presently it was as though the tunnel were level and as we advanced, the whole little Zurian world seemed turning forward and up over us. All in the viewpoint. Up or down; top or bottom--they are meaningless terms except for comparison. It was growing steadily colder now. The roof moisture seldom dropped. Ice formations were everywhere here. There was a place where the roof was suddenly much lower, so that I could see an intricate lacery of ice-clusters up there, prismatic with glorious colors. Like stalagmites here on the tunnel floor, the ice stood in great columns, crinkled, glittering with a myriad facets of sparkling sheen. There were other tunnels crossing us now. I tried to imagine how far we had gone. Certainly a mile. Then I was aware, as we rounded a curve, that ahead of us the shining passage was opening up into some sort of apartment. The light-sheen there was more intense. The crowd of Zurians had fallen silent now; and as another passage crossed us at an angle, our immediate captors herded most of their fellows away. Silently we advanced, with three Zurians gripping each of us. It was as though now we were advancing into some sacred place, so that our captors were suddenly respectfully silent. "What the devil," Carruthers muttered, as I was shoved close to him. We came out of the tunnel. I had a quick glimpse of a big blue-white ice-grotto here--walls glittering with an opalescent sheen on hanging veils of ice. And then I gasped; stared, numbed. The Ice Maiden! The girl Alan and I had seen through the _Planeteer's_ telescope! At the end of the grotto, perhaps a hundred feet from us now, on a small raised dais, she reclined on a pile of white furs. Her head and shoulders were raised on one elbow, her graceful pink-white limbs half revealed by the short white fur garment draped over her loins and breasts. Her hair, blue-white as spun ice, fell in profusion over her shoulders, framing her small oval face that was beautiful with a perfection of earth-beauty!