Stanley G. Weinbaum 
Dawn of Flame 

Hull Tarvish looked backward but once, and that only as he reached the elbow of the road. The sprawling little stone cottage that had been home was visible as he had seen it a thousand times, framed under the cedars. His mother still watched him, and two of his younger brothers stood staring down the Mountainside at him. He raised his hand in farewell, then dropped it as he realized that none of them saw him now; his mother had turned indifferently to the door, and the two youngsters had spied a rabbit. He faced about and strode away, down the slope out of Ozarky.He passed the place where the great steel road of the Ancients had been, now only two rusty streaks and a row of decayed logs. Beside it was the mossy heap of stones that had been an ancient structure in the days before the Dark Centuries, when Ozarky had been a part of the old state of M’souri. The mountain people still sought out the place for squared stones to use in building, but the tough metal of the steel road itself was too stubborn for their use, and the rails had rusted quietly these three hundred years.That much Hull Tarvish knew, for they were things still spoken of at night around the fireplace. They had been mighty sorcerers, those Ancients; their steel roads went everywhere, and everywhere were the ruins of their towns, built, it was said, by a magic that lifted weights. Down in the valley, he knew, men were still seeking that magic; once a rider had stayed by night at the Tarvish home, a little man who said that in the far south the secret had been found, but nobody ever heard any more of it.