"Nearly two months have passed since the new satellite crashed into the gravitational field of Earth, its coming manifested by earth shocks and a great tidal wave. The globe, as we know, was invisible. Although still unseen, and only a black circle that blocks out distant stars, it is visible in the telescopes of the astronomers; its distance and its orbital motion have been determined. "And now this New Yorker claims to have penetrated space: to have landed on the Dark Moon: and to have returned to Earth. Broad claims, indeed, especially so in view of the fact that Harkness refuses to submit his ship for examination by the Stratosphere Control Board. He has filed notice of ownership, thus introducing some novel legal technicalities, but, since space-travel is still a dream of the future, there will be none to dispute his claims. "Of immediate interest is Harkness' claim to have discovered a gas that is fatal to the serpents of space. The monsters that appeared when the Dark Moon came and that attacked ships above the Repelling Area are still there. All flying is confined to the lower levels; fast world-routes are disorganized. "Whether or not this gas, of which Harkness has a sample, came from the Dark Moon or from some laboratory on Earth is of no particular importance. Will it destroy the space-serpents? If it does this, our hats are off to Mr. Walter Harkness; almost will we be inclined to believe the rest of his story--or to laugh with him over one of the greatest hoaxes ever attempted." Chet had been too intent upon the newscast to heed an opening door at his back.... * * * * * "How about it, Chet?" a voice was asking. "Would you call it a hoax or the real thing?" And a girl's voice chimed in with exclamations of delight at sight of the patient, so evidently recovering. "Diane!" Chet exulted, "--and Walt!--you old son-of-a-gun!" He found himself clinging to a girl's soft hand with one of his, while with the other he reached for that of her companion. But Walt Harkness' arm went about his shoulders instead. "I'd like to hammer you plenty," Harkness was saying, "and I don't even dare give you a friendly slam on the back. How's the side where they got you with the spear?--and how are you? How soon will you be ready to start back? What about--" Diane Delacouer raised her one free hand to stop the flood of questions. "My dear," she protested, "give Chet a chance. He must be dying for information." "I was dying for another reason the last time I saw you," Chet reminded her, "--up on the Dark Moon. But it seems that you got me back here in time for repairs. And now what?" His nurse came into the room with extra chairs; Chet waited till she was gone before he repeated: "Now what? When do we go back?"