[Dr. Goodwin's lucid and exceedingly comprehensive description of this extraordinary mechanism has been deleted by the Executive Council of the International Association of Science as too dangerously suggestive to scientists of the Central European Powers with which we were so recently at war. It is allowable, however, to state that his observations are in the possession of experts in this country, who are, unfortunately, hampered in their research not only by the scarcity of the radioactive elements that we know, but also by the lack of the element or elements unknown to us that entered into the formation of the fiery ball within the cube of black crystal. Nevertheless, as the principle is so clear, it is believed that these difficulties will ultimately be overcome.--J. B. K., President, I. A. of S.] The wide, glistening road was gay with the coria. They darted in and out of the gardens; within them the fair-haired, extraordinarily beautiful women on their cushions were like princesses of Elfland, caught in gorgeous fairy webs, resting within the hearts of flowers. In some shells were flaxen-haired dwarfish men of Lugur's type; sometimes black-polled brother officers of Rador; often raven-tressed girls, plainly hand-maidens of the women; and now and then beauties of the lower folk went by with one of the blond dwarfs. We swept around the turn that made of the jewel-like roadway an enormous horseshoe and, speedily, upon our right the cliffs through which we had come in our journey from the Moon Pool began to march forward beneath their mantles of moss. They formed a gigantic abutment, a titanic salient. It had been from the very front of this salient's invading angle that we had emerged; on each side of it the precipices, faintly glowing, drew back and vanished into distance. The slender, graceful bridges under which we skimmed ended at openings in the upflung, far walls of verdure. Each had its little garrison of soldiers. Through some of the openings a rivulet of the green obsidian river passed. These were roadways to the farther country, to the land of the ladala, Rador told me; adding that none of the lesser folk could cross into the pavilioned city unless summoned or with pass. We turned the bend of the road and flew down that farther emerald ribbon we had seen from the great oval. Before us rose the shining cliffs and the lake. A half-mile, perhaps, from these the last of the bridges flung itself. It was more massive and about it hovered a spirit of ancientness lacking in the other spans; also its garrison was larger and at its base the tangent way was guarded by two massive structures, somewhat like blockhouses, between which it ran. Something about it aroused in me an intense curiosity. "Where does that road lead, Rador?" I asked. "To the one place above all of which I may not tell you, Goodwin," he answered. And again I wondered.