"Nowhere to go but out!" grinned Larry. "And I'll bet Golden Eyes is waiting for us with a taxi!" He stepped forward. We followed, slipping, sliding along the glassy surface; and I, for one, had a lively apprehension of what our fate would be should that enormous mass rise before we had emerged! We reached the end; crept out of the narrow triangle that was its exit. We stood upon a wide ledge carpeted with a thick yellow moss. I looked behind--and clutched O'Keefe's arm. The door through which we had come had vanished! There was only a precipice of pale rock, on whose surfaces great patches of the amber moss hung; around whose base our ledge ran, and whose summits, if summits it had, were hidden, like the luminous cliffs, in the radiance above us. "Nowhere to go but ahead--and Golden Eyes hasn't kept her date!" laughed O'Keefe--but somewhat grimly. We walked a few yards along the ledge and, rounding a corner, faced the end of one of the slender bridges. From this vantage point the oddly shaped vehicles were plain, and we could see they were, indeed, like the shell of the Nautilus and elfinly beautiful. Their drivers sat high upon the forward whorl. Their bodies were piled high with cushions, upon which lay women half-swathed in gay silken webs. From the pavilioned gardens smaller channels of glistening green ran into the broad way, much as automobile runways do on earth; and in and out of them flashed the fairy shells. There came a shout from one. Its occupants had glimpsed us. They pointed; others stopped and stared; one shell turned and sped up a runway--and quickly over the other side of the bridge came a score of men. They were dwarfed--none of them more than five feet high, prodigiously broad of shoulder, clearly enormously powerful. "Trolde!" muttered Olaf, stepping beside O'Keefe, pistol swinging free in his hand. But at the middle of the bridge the leader stopped, waved back his men, and came toward us alone, palms outstretched in the immemorial, universal gesture of truce. He paused, scanning us with manifest wonder; we returned the scrutiny with interest. The dwarf's face was as white as Olaf's--far whiter than those of the other three of us; the features clean-cut and noble, almost classical; the wide set eyes of a curious greenish grey and the black hair curling over his head like that on some old Greek statue. Dwarfed though he was, there was no suggestion of deformity about him. The gigantic shoulders were covered with a loose green tunic that looked like fine linen. It was caught in at the waist by a broad girdle studded with what seemed to be amazonites. In it was thrust a long curved poniard resembling the Malaysian kris. His legs were swathed in the same green cloth as the upper garment. His feet were sandalled.