survived, they'd each played an important role in the evolution of Atherton. But Edgar had never stopped feeling restless. The rope between them moved ever so slightly and Isabel leaned out, craning her neck down in search of Edgar in the darkness below. For a while she'd been able to see him clearly, but he was too far away now. She noticed that the rope seemed to lie differently than it had when he'd started. Gravity pulled every thing in toward the bottom of Atherton, so the rope didn't exactly hang straight down. It curved inward with a big looping shape. She could not see its end. "Edgar?" said Isabel. She couldn't yel his name too loudly. The village was only a half-hour walk away and voices carried something fierce on Atherton. What if someone were out looking for them? She said his name once more, a little louder, and then she scampered away from the edge and began hauling in the rope. It was much lighter than it should have been. The rope was a hundred feet long and as it piled up beside her she grew more and more afraid. "Keep pulling!" said Samuel, still lying at the edge of Atherton. "I don't see him!" Soon the end of the rope came over the edge with a soft snapping sound. There was no one tied to the other end. Edgar was gone. The rocky terrain of Atherton's outer shell was a perfect place for Edgar to regain his confidence. Giant rocks and fissures provided plenty of hand-and footholds. And the surface was bursting with sharp edges and protruding masses of grey and brown stone. The gravity on Atherton pushed against his back so his legs and arms didn't dangle out into the air. And yet, if he'd let go altogether, he felt certain he would freefall until he smacked into something hard. The thought of crashing into the bottom of Atherton made Edgar extra cautious as he continued down the curved side of the strange world he lived on. One thing had made the going slow and tedious: the rope tied around his midsection, which had bothered him from the start. It kept getting in his way, wrapping around an arm or a leg and forcing him to rethink his position. And what was worse, the rope kept snagging on sharp rocks and jerking him to a stop as he descended. He actually felt unsafe with it tied around him. He didn't want to scare Isabel and Samuel, so at first he'd managed to untie the rope and put it between his teeth. But it kept snagging, pulling his head back, and soon he'd decided to let go of it altogether. He opened his mouth and let the rope swing lazily against the rocks. "It hangs almost like someone's holding on," Edgar said aloud. "Maybe they'll think I'm still attached to it." He looked down at the vast space left to be explored. "Just a little farther..." Samuel had only been half right when he'd guessed about what drove Edgar to climb. It was true Edgar had first begun climbing so long ago because he'd had a distant memory of something hidden in the stone walls above him and he wanted to find it. But somewhere along the way the climbing became something more. There was something amazing about holding on to Atherton itself, like he was truly part of Atherton. Whenever he reached the top or the bottom of a climb he felt sadness at having to let go. It was like cutting himself away from the world. Tonight Edgar wanted to go far enough to see where the orange light came from. There were two men Edgar had asked about this: Dr. Kincaid, the often secretive old man of science, and Vincent, Dr. Kincaid's protector and companion. Both men had lived in the Flatlands long before Atherton's violent collapse. They'd had years and years near the edge without anyone else around. When he asked the two men about the light, they re sponded with what seemed to Edgar like rehearsed shrugs. Either they didn't know where the light came from or they wouldn't tell. The light glowed brighter as Edgar traveled down a certain fissure, but he couldn't guess how much