spite of their internal skeletons, with anywhere from four to twelve legs each on their segmented bodies. None acted like dangerous beasts. But something had happened to the exploration party fifteen years back, and to the more recent ship under Hennessy that was sent to check up. He turned to the port to stare out at the planet. The Sol-type sun must be rising, since there was a dim light. But the thick clouds that wrapped the entire world diffused its rays into a haze. For a change, it wasn't raining, though the ground was covered by thick swirls of fog. In the distance, the tops of shrubs that made a scrub forest glowed yellow-green. Motions around them suggested a herd of feeding animals. Details were impossible to see through the haze. Even the deep gorge where they'd found Hennessy's carefully buried ship was completely hidden by the fog. There were three of the blobs dancing about over the grazing animals now, as they often seemed to do. Gwayne stared at them for a minute, trying to read sense into the things. If he had time to study them.... But there was no time. Earth had ordered him to detour here, after leaving his load of deep-sleep stored colonists on Official World 71, to check on any sign of Hennessy. He'd been here a week longer than he should have stayed already. If there was no sign in another day or so of what had happened to the men who'd deserted their ship and its equipment, he'd have to report back. He would have left before, if a recent landslip hadn't exposed enough of the buried ship for his metal locators to spot from the air by luck. It had obviously been hidden deep enough to foil the detectors originally. "Bob!" Jane Corey's voice cut through his pondering. "Bob, there are the kids!" Before he could swing to follow her pointing finger, movement caught his eye. The blobs had left the herd. Now the three were streaking at fantastic speed to a spot near the ship, to hover excitedly above something that moved there. He saw the two cadets then, heading back to the waiting ship, just beyond the movement he'd seen through the mist. Whatever was making the fog swirl must have reached higher ground. Something began to heave upwards. It was too far to see clearly, but Gwayne grabbed the microphone, yelling into the radio toward the cadets.