Two minutes later, arrayed in the green clothing of the House of Dalis, swathed in it from neck to toe, wearing their belts and the masks which were necessary to life in space where there was no atmosphere, the whole topped by the gleaming helmets whose skull-pans held the infinitesimally small anti-gravitational ovoids, Jaska and Sarka entered the secret exit dome, side by-side. On the breast and back of each showed the yellow stars of the Gens of Dalis. There was no hiding their identity otherwise, and if any of the Gens saw them, both would be immediately recognized--for Jaska had commanded the Gens, and Sarka was the world's greatest scientist known to every human being. But they planned on carrying out their investigations by stealth. "Father," said Sarka, "when the inner door is closed upon us, you have but to press the button to the right of the door. Press it when the light beside it glows red, which will indicate that we have willed ourselves to go to a certain destination!" * * * * * The inner door closed upon Sarka and Jaska, and, hand in hand, side by side, their bodies glowing with knowledge of warm, sympathetic contact, they waited for a miracle which had never before been attempted. "Are you afraid, beloved?" queried Sarka. "When I am with you," she said softly, "I have no fear." "Then face the outer door, and will to go wherever I will to take you!" Side by side, hand-in-hand still, they faced the outer door, and Sarka willed: "Let us appear together in a deserted spot, within sight but unseen, of the Moon crater from which those aircars were sent against us!" A sudden blur, a cessation of all knowledge, and then.... Sarka and Jaska stood side by side in a desolate expanse surrounded by bleak and appalling mountains of grotesque shape, in a light that was weirdly, awesomely blue. Their feet were invisible, deeply rooted in some soft, fine material which looked like snow. After a swift glance around to see if anything lived or moved in this awful desolation, Sarka stooped and dipped up some of the fine stuff with his fingers, touched it to his lips. * * * * * The material seemed to be fine blue ashes and on his tongue it had a soapy savor. He peered at Jaska, whose eyes were glowing with excitement, whose lips were parted with anticipation, and instantly he opened a mental conversation with her. "We must speak with each other telepathically, but do not speak with me until I have explained to you how to mask your thoughts from all persons save the one with whom you hold converse! First, I love you! Second, let us see if, searching the sky, we can find the Earth!"