She gave him a look that made him wish he had thought of something more convincing. Then her expression softened as she noticed the old sign above the doorway. "Your granddad would have made you explain every single one before he let you put them in here." She handed him a spoon. "I suppose that means you've got some explaining to do."
Noah opened his notebook on the nearest bench. "I think I can. I just need to start with the identification plates." Outside, the first drops of rain began to strike the corrugated roof, and the workshop filled with the sound of weather and the possibility of being wrong.
The first notebook Noah opened was not the first one Earl had written. It was the one with the green cloth cover, the volume his grandfather kept beside the lathe during Noah's childhood. The binding had separated along the spine, and tiny crescent-shaped stains marked pages turned by oily fingers. On the first sheet Earl had written a single sentence in block capitals: KNOW WHAT THE MACHINE IS SUPPOSED TO DO BEFORE YOU DECIDE WHAT IS WRONG WITH IT.
Noah had read those words at least a hundred times. At twelve, he had understood them as another piece of advice meant to slow him down when he wanted to start an engine before lunch. At seventeen, with sixteen questionable machines occupying the workshop, they suddenly felt more serious. He took a folding chair to the bench, sharpened a pencil, and began a separate inventory book with space for each engine's identity, visible condition, missing parts, and questions that required more research.
His earliest memory of the workshop was not of making a repair. It was of sitting on a flour bucket while Earl worked on a farmer's generator, listening to the old mechanic ask the same question three different ways. "What do you see?" Earl would say, and Noah would point to a cracked hose.
"What does that tell you?" Earl would ask next, forcing him to think past the visible damage. Then came the question Noah hated most: "What does it not tell you?"
There was always something the evidence did not tell him. A damaged hose did not prove why it had split. Oil beneath an engine did not identify the original leak. An engine that started with a freshly charged battery might still be unfit for a full day of work. Earl seemed to enjoy the moment when Noah discovered that the answer he was certain about was only the beginning of another question.
On one particular summer afternoon, a farmer named Ben Avery had brought in a worn irrigation pump drive. Noah remembered watching Earl listen to the machine for several minutes before touching a tool. The old engine started, smoked briefly, and settled into a sound Noah thought was acceptable. Earl shook his head and said the machine was telling them it could manage the first five minutes but might not survive the next five hours.