And then I noticed that, weirdly, there seemed light inherent to these Zurian rock-masses. Some of the cave-mouths were not quite black--a little light appeared in them, glowing with a prismatic sheen. A thousand feet. I was at the gravity control-board now, executing Dr. Livingston's swift murmured orders. Without our modern rocket-streams, the little _Planeteer_, I must admit, was unwieldy. We were dropping slowly, with a side drift. In a corner Alan sat staring at us, with his hands gripped between his knees, his fingers working nervously. Duroh and Carruthers were standing tense beside me. It was a touchy few minutes. We were some two hundred feet above a broken ice-strewn plateau, with a side drift that was carrying us toward a small cliff. I could see where Dr. Livingston intended to land now--a little shallow bowl-depression near the cliff, where the bottom seemed flat, with soft snow. The _Planeteer_ was hovering upright, with a very slow, vertical axis rotation, so that as I used the cliff's repulsion to check our drift, I was shifting the current constantly in our side gravity plates. Queer how one may think of two things at once! I was seated at the control table, with my fingers roving its gravity-plate shifting keys. Dr. Livingston was tensely peering through the side bull's-eyes, gauging our position, our downward and sidewise drift; calling out to me his orders. Certainly my mind had never been more alertly on anything than it now was on those gravity keys. But nevertheless, suddenly I was aware of an electric feeling here in the control room. Carruthers and Duroh exchanging glances. And over in the corner young Alan, with his hands between his knees, his fingers writhing, his dark gaze brooding on me. "Base negation! Full--quickly now!" Dr. Livingston called. We were almost over the snowy depression--hardly the height of the _Planeteer_ above it. I flung on the base repulsion; held it only some ten seconds. Then gave attraction for an instant. That may have been the first landing of any space-ship in the history of the Universe. I do not know, of course; but I will say we eased the little _Planeteer_ down as light as a falling snowdrop. There was hardly a bump as we landed, with the base flat in the melting snow, and the globe of the _Planeteer_ almost exactly upright. "Good enough, John. We did it!" Dr. Livingston was triumphant. He swung toward me, his face flushed with pleasure. Jim Carruthers was close beside him. "Good work, wasn't it, Jim?"