More Than Human by Theodore Sturgeon

there was such a way but it could not be expressed except by facts not in Lone’s or Janie’s possession. Janie said it sounded to her like, radio tubes and with only that to go on, Lone proceeded by entering the next night a radio service shop and stealing a heavy armload of literature. He bulled along unswerving, unstoppable, until at last Janie relinquished her opposition because she had not energy for it and for the research as well. For days she scanned elementary electricity and radio texts which meant nothing to her but which apparently Baby could absorb faster than she scanned.
       And at last the specifications were met: something which Lone could make himself, which would involve only a small knob you pushed to make the truck heavier and pulled to make it lighter, as well as an equally simple attachment to add power to the front wheels—according to Baby a sine qua non .
       In the half-cave, half-cabin, with the fire smoking in the centre of the room and the meat turning slowly in the updraft, with the help of two tongue-tied infants, a mongoloid baby and a sharp-tongued child who seemed to despise him but never failed him, Lone built the device. He did it, not because he was particularly interested in the thing for itself, nor because he wished to understand its principles (which were and would always be beyond him), but only because an old man who had taught him something he could not name was mad with bereavement and needed to work and could not afford a horse.
    He walked most of the night with it and installed it in the dim early hours of the morning. The idea of “pleasant surprise” was far too whimsical a thing for Lone but it amounted to the same thing. He wanted it ready for the day’s work, without any time lost by the old man prancing around asking questions that he couldn’t answer.
       The truck stood bogged in the field. Lone unwound the device from around his neck and shoulders and began to attach it according to the exact instructions he had winnowed out of Baby. There wasn’t much to do. A slender wire wrapped twice around the clutch housing outside and led to clamps on the front spring shackles, the little brushes touching the insides of the front wheels; and that was the front-wheel drive. Then the little box with its four silvery cables, box clamped to steering post, each cable leading to a corner of the frame.
       He got in and pulled the knob towards him. The frame creaked as the truck seemed to raise itself on tiptoe. He pushed the knob forward. The truck settled its front axle and differential housing on solid ground with a bump that made his head rock. He looked at the little box and its lever admiringly, then returned the lever to a neutral position. He scanned the other controls there, the ones which came with the truck: pedals and knobs and sticks and buttons. He sighed.
       He wished he had wit enough to drive a truck.
       He got out and climbed the hill to the house to wake Prodd. Prodd wasn’t there. The kitchen door swung in the breeze, the glass gone out of it and lying on the stoop. Mud wasps were building under the sink. There was a smell of dirty dry floorboards, mildew, and ancient sweat. Otherwise it was fairly neat, about the way it was when he and Prodd had cleaned up last time he was here. The only new thing there aside from the mud wasps’ nest was a paper nailed to the wall by all four corners. It had writing all over it. Lone detached it as carefully as he could, and smoothed it out on the kitchen table, and turned it over twice. Then he folded it, put it in his pocket. Again he sighed.
       He wished he had sense enough to learn to read.
       He left the house without looking back and plunged into the forest. He never returned. The truck stood out in the sun, slowly deteriorating, slowly weakening its already low resistance to rust, slowly falling to pieces around the bright, strong, strange