It was a matter of a half hour later when Harkness ordered them all outside. He had accepted Kreiss as an addition to their ranks and had made himself plain to Schwartzmann. To the scientist he said. "You remarked that no ship could hold two commanding pilots: that goes for an expedition like this, too. I am in command. If you will take orders we will be mighty glad to have you with us." And to Schwartzmann, in a different tone: "I am sparing you and your men. I ought to shoot you down, but I won't. And I don't expect you to understand why; any decency such as that would beyond you. "But I am letting you live. This world is big enough to hold us both, and pretty soon I will tell you what part of it you can live in. And then remember this one thing, Schwartzmann--get this straight!--you keep out of my way. I will show you a valley where you and your men can stay. And if ever you leave that valley I will hunt you down as I would one of the beasts that you will see in this world." Chet had to repress a little smile that was twitching at his lips; it always amused him hugely to see Harkness when roused. "Turn us out to starve?" Schwartzmann was demanding. "You would do that?" "There will be food there," said Harkness curtly: "suit yourself about starving. Only stay where I put you!" Back of the others of Schwartzmann's men, the pilot, Max, was stooping. Half-hidden he moved toward the doorway to the rear cabin and to the storage-room and gun-rooms beyond. Chet glimpsed him in his silent retreat. "I wouldn't do that if I were you, Max," he advised quietly. "Personally, I think you're all getting off too well; as for myself, I'm sort of itching for an excuse to let off this gun." It was here that Harkness turned to the open port. "Put them out!" he snapped. "You, Chet, go out first and line them up as they come--but, no, wait: there may be gas out there." * * * * * Chet was beside the port; a breath from outside came to him sweetly fragrant. A shadow was moving across the smooth lava rock. "A bird!" he thought. Then a flash of red in startling vividness swept past the open door: it was like a quick flicker of living flame. He could not see what it was, but it was alive--and this answered his question. "Send 'em along," he said; "it seems all right now." He stepped through the opening in the heavily insulated walls. It was early morning, yet the sun was already hot upon the smooth expanse of the lava flow. Some ancient eruption from the distant peaks that hemmed in the valley had sent out this flood of molten rock; it was hard and black now. But, to the right, where the valley went on and up, and rose gently and widened as it rose, a myriad of red flames and jets of steam told of the inner fires that still raged.