As though his microscopic voice could reach me--my head hundred of feet above him. But he screamed it again. This was all in a few horrible moments, though it seemed to the three watchers an eternity. Alan was helpless to aid me; they had taken all of the enlarging drug they had. Then they saw Polter cast me off. I lurched and struck, with my shoulders wedged against the cliff directly over where they crouched. The overhead sky was darkened as Polter scrambled upward. Alan was still screaming futilely, "George--up! Get out!" Babs huddled with white, horrified face, staring. Then I went out after Polter. My disappearing legs were great dark blurs in the sky. Alan saw the valley now contracted to a thousand feet of width, with its cliffs equally as high. Then everything was smaller.... The sky overhead went dark again; from cliff to cliff a segment of our rolling bodies momentarily spanned the opening. * * * * * And presently Alan realized that the valley had narrowed to a pit. He stood up. "Hurry! Now we can get out after them. Up there!" The opening above was empty. Polter and I were fighting some distance away.... Dr. Kent was soon large enough to scramble out of the pit. Alan handed the little Babs up to him and followed. Alan saw that they were now in a long gully, blind at one end with a five hundred-foot perpendicular cliff. Against the wall, the titanic form of Polter stood at bay. And I was fronting him. The summit of the cliff was lower than our waists. Triumph swept Alan; he saw that I was the larger! As Polter bored into me my backward step crossed the full width of the gully. Alan shouted: "Down! Babs--Father!" They had barely time to flatten themselves in a narrow crevice between upstanding rocks before my foot crashed down. For an instant the sole of my boot formed a flat black ceiling as it trod and spanned the rocks. Then it lifted; was gone with a blurred swoop. They saw the white blur of my hand come down and snatch a tremendous boulder, raising it with a great sweep of movement into the sky. They saw me crash it against Polter; but it only struck his shoulder. He roared with anger. The whole sky was roaring and rumbling with our shouts and our panting breathing, and the ground was clattering, pounding with our giant tread. Huge loose boulders were tumbled in an avalanche everywhere. Again it seemed to Alan that our lurching, heedlessly surging bodies must be crushed within these contracting walls. Only our locked, intertwined legs were visible; our bodies were lost in the sky. Then it seemed to Alan that I had heaved Polter upward. And followed him. We disappeared. There was a distant overhead rumble, and the murky sky, with vague patches of far-distant illumination in it, became empty of movement.... The walls presently were again closing upon Alan and his companions. They ran out of the open end of the shrinking little gully and came to a new upward vista....