I noticed now that overhead the turgid murk had turned into the blue of distance. A sky. It was faintly sky-blue, and there seemed a haze in it, almost as though clouds were forming. It had been cold when we started. The exertion had kept us fairly comfortable; but now I realized that the air was far warmer. It was a different air, more humid, and I thought the smell of moist earth was in it. Rocks and boulders were strewn here on the floor of this giant valley, and I saw occasional pools of water. There had been rain recently! The realization came with a shock of surprise. This was a new world! A faint, luminous twilight was around us. And then I noticed that the light was not altogether coming from overhead. It seemed inherent to the rocks themselves. They glowed very faintly luminous, as though phosphorescent. We were now well embarked upon this strange journey. We spoke seldom. Glora was intent upon guiding us. She was trying to make the best possible speed. I realized that it was a case of judgment, as well as physical haste. We had dropped into that six-foot pit. Had we waited a few moments longer, the depth would have been a hundred feet, two hundred, a thousand! It would have involved hours of arduous descent--if we had lingered until we were a trifle smaller! * * * * * We took other pellets. We traveled perhaps an hour more. There were many instances of Glora's skill. We squeezed into a gully and waited until it widened; we leaped little expanding caverns; we slid down a smooth yellowish slide of rock like a child's toboggan, and saw it behind and over us, rising to become a great spreading ramp extending upward into the blue of the sky. Now, up there, little sailing white clouds were visible. And down where we stood it was deep twilight, queerly silvery with the phosphorescence from the luminous rocks as though some hidden moon were shining. Strange, new world! I suddenly envisaged the full strangeness of it. Around me were spreading miles of barren, naked landscape. I gazed off to where, across the rugged plateau we were traversing, there was a range of hills. Behind and above them were mountains; serrated tiers, higher and more distant. An infinite spread of landscape! And, as we dwindled, still other vast reaches opened before us. I gazed overhead. Was it--compared to my stature now--a thousand miles, perhaps even a million miles up to where we had been two or three hours ago? I think so. Then suddenly I caught the other viewpoint. This was all only an inch of golden quartz--if one were large enough to see it that way! Alan had been trying to memorize the main topographical features of our route. It was not as difficult as it seemed at first. We were always far larger than normal to our environment. The main distinguishing characteristics of the landscape were obvious--the blind gully, with the round pit, for instance, or the ramp-slide.