"It's not fair to trap me!" she cried passionately, "It's not fair!" "I'll stop," said Calhoun. He turned to the control-board. The Med Ship was only planetary diameters from Orede, now, and the electron telescope showed shining stars in leisurely motion across its screen. Then a huge, gibbous shining shape appeared, and there were irregular patches of that muddy color which is sea-bottom, and varicolored areas which were plains and forests. Also there were mountains. Calhoun steadied the image and squinted at it. "The mine," he observed, "was found by members of a hunting-party, killing wild cattle for sport." * * * * * Even a small planet has many millions of square miles of surface, and a single human installation on a whole world will not be easy to find by random search. But there were clues to this one. Men hunting for sport would not choose a tropic nor an arctic climate to hunt in. So if they found a mineral deposit, it would have been in a temperate zone. Cattle would not be found deep in a mountainous terrain. The mine would not be on a prairie. The settlement on Orede, then, would be near the edge of mountains, not far from a prairie such as wild cattle would frequent, and it would be in a temperate climate. Forested areas could be ruled out. And there would be a landing-grid. Handling only one ship at a time, it might be a very small grid. It need be only hundreds of yards across and less than half a mile high. But its shadow would be distinctive. Calhoun searched among low mountains near unforested prairie in a temperate zone. He found a speck. He enlarged it many-fold, and it was the mine on Orede. There were heaps of tailings. There was something which cast a long, lacy shadow. The landing-grid. "But they don't answer our call," observed Calhoun, "so we go down unwelcomed." He inverted the Med Ship and the emergency-rockets boomed. The ship plunged planetward. A long time later it was deep in the planet's atmosphere. The noise of its rockets had become thunderous, with air to carry and to reinforce the sound. "Hold on to something, Murgatroyd," commanded Calhoun. "We may have to dodge some ack." But nothing came up from below. The Med Ship again inverted itself, and its rockets pointed toward the planet and poured out pencil-thin, blue-white, high-velocity flames. It checked slightly, but continued to descend. It was not directly above the grid. It swept downward until almost level with the peaks of the mountains in which the mine lay. It tilted again, and swept onward over the mountain-tops, and then tilted once more and went racing up the valley in which the landing-grid was plainly visible. Calhoun swung it on an erratic course, lest there be opposition.