"Listen, Walt," he whispered; "the Moon's out of sight; it's easy to lose. Maybe I can't find it again, anyway—it's going to take some nice navigating—but I'll miss it by ten thousand miles if you say so, and even the Herr Doktor can't check me on it."

Chet saw the eyes of Schwartzmann grow intent. He reached ostentatiously for another book of tables, and he seated himself that he might figure in comfort.

"Just check me on this," he told Harkness.

He put down meaningless figures, while the man beside him remained silent. Over and over he wrote them—would Harkness never reach a decision?—over and over, until—

"I don't agree with that," Harkness told him and reached for the stylus in Chet's hand. And, while he appeared to make his own swift computations, there were words instead of figures that flowed from his pen.

"Only alternative: return to Earth," he wrote. "Then S will hold off; wait in upper levels. Kreiss will give him new bearings. We'll shoot out again and do it better next time. Kreiss is nobody's fool. S means to maroon us on Moon—kill us perhaps. He'll get us there, sure. We might as well go now."


Chet had seen a movement across the room. "Let's start all over again," he broke in abruptly. He covered the writing with a clean sheet of paper where he set down more figures. He was well under way when Schwartzmann's quick strides brought him towering above them. Again the detonite pistol was in evidence; its small black muzzle moved steadily from Harkness to Chet.

"For your life—such as is left of it—you may thank Herr Doktor Kreiss," he told Chet. "I thought at first you would have attempted to kill us." His smile, as he regarded them, seemed to Chet to be entirely evil. "You were near death twice, my dear Herr Bullard; and the danger is not entirely removed.

"'Forty-seven hours' you have said; in forty-seven hours you will land us on the Dark Moon. If you do not,"—he raised the pistol suggestively—"remember that the pilot, Max, can always take us back to Earth. You are not indispensable."