Had Kress, possessor of one of the keenest scientific minds in the world, taken leave of his senses? "If I don't come back," he had said. What did he expect to do? Fly off the earth utterly? That was silly. But when the partners looked again at Kress they both had the same feeling. It probably wasn't as silly as it sounded. Did Kress know something he wasn't telling them? Did he really think he might ... well, might fly off the earth entirely, away beyond her atmosphere, and never return? How utterly absurd! And yet.... "Of course we'll do it," said Jeter. "We'd do it anyway, without word from you. We haven't stopped our own work because of your swiftly approaching conquest of the greater heights. But why shouldn't you come back?" * * * * * For a moment there was a look of positive dread upon Kress' face. Then he spoke again very quietly: "You know all the stuff that's been written about my flight," he said. "Most of it has been nonsense. How could laymen newspaper reporters have any conception of what I may encounter aloft? They've tried to make something of the recent passage of the Earth through an area of so-called shooting stars. They've speculated until they're black in the face as to the true nature of the recent bombardment of meteorites. They've pictured me as a hero in advance, doomed to death by direct attack from what they are pleased to call--after having invented them--denizens of the stratosphere." "Yes?" said Jeter, when Kress paused. Kress took a deep breath. "They've come nearer than they hoped for in some guesses," he said. "Of course I don't know it, but I've had a feeling for some time. You know what sometimes happens when a man gets a sudden revolutionary idea? He concentrates on it like all get-out. Then somebody else bursts into the newspapers with the same identical idea, which in turn brings out hordes of claims to the same idea by countless other people. It's no new thing to writers and such-like gentry. They know that when they get such an idea they must act on it at once or somebody else will, because their thoughts on the subject have gone forth and impinged upon the mental receiving sets of others. Well, that's a rough idea, anyway. This idea of denizens of the stratosphere has attacked the popular imagination. You'll remember it broke in the papers _simultaneously_, in thirty countries of the world!" A cold chill ran down the spine of Tema Eyer. He saw, in a flash, whither Kress' thoughts were tending--and when he saw that, it thrilled him, too, for it seemed to be proof of the very thing Kress was saying. "You mean," he said hoarsely, "that you too think there may be something up there, something ... well, sensate? Some great composite thought which inspires the general dread of stratosphere denizens?"