On the last Friday of the third week, Noah stayed late enough to watch the sky darken through the workshop windows. His pencil hand ached, and small numbers had blurred together during the final hour. He had earned almost no money during the entire inventory process. Still, when he spread the completed identification sheets across the workbench, he felt more certain about the purchase than he had felt when the first engine started.
He now knew how many assumptions he had been carrying without noticing them. He knew which engines were unusable as complete units, which parts needed specialist assessment, and where service information could be obtained. The knowledge did not fit neatly into a profit column, and it would not impress the auction manager if Noah went back that afternoon. It was nevertheless the first thing the purchase had produced that he could trust without qualification.
Rachel found him sitting with the inventory book open. She read some of the headings, then examined a small page of calculations tucked into the back. "You're still in the red," she observed.
"Very red," Noah admitted.
"And you look happier than you did when you sold that first engine."
He thought about that. "Because I know more now. I was excited before, but I didn't know what I didn't know."
Rachel reached across the table and touched his wrist. "Your granddad used to say the hardest part of a job was finding out which questions you'd forgotten to ask." Noah looked toward the old chair beneath the window. For the first time since Earl's funeral, the emptiness of that chair felt less like an ending and more like a place from which someone was still teaching.
The call that changed Noah's season came on a Wednesday when the sky over Tennessee was heavy with the kind of humid clouds that made farmers watch the weather twice an hour. He was at the kitchen table, finishing a mathematics assignment while Rachel sorted grocery coupons beside him. The workshop phone had not rung in days. When it finally did, the sound startled both of them.
"Walker Diesel Service?" Noah answered, borrowing the old greeting from memory before remembering that the business was not officially operating under that name yet.
A man introduced himself as Daniel Mercer, a dairy farmer about forty minutes away. He explained that the backup generator serving his farm's milk-cooling equipment had developed a problem in its mechanical drive assembly. His regular technician had isolated the fault, but the replacement component was difficult to obtain, and the available suppliers could not promise delivery for several days. With unstable weather approaching, Daniel was uncomfortable depending on the hope that the main electrical supply would remain uninterrupted.
Noah reached for his inventory book. "Do you have the generator model and serial number?"
Daniel paused. "I can get them. Are you the young man who bought the engines at the liquidation auction?"
"Yes, sir."
"I'm asking because a mechanic suggested I call you, but I don't want to waste either of our time. I need a part that fits, not one that looks close enough to persuade somebody to try it."