“When?”
“Late Wednesday night.”
Ethan looked at the sky.
Roughly sixty hours.
Maybe less if the wind arrived first.
He looked toward the eighty-foot grain cart parked near the field entrance.
They had equipment.
Fuel.
Trucks.
Drivers.
Neighbors willing to help.
But everything depended on the combine.
A farm could own a million dollars in machinery and still be defeated by a connection smaller than a man's finger.
A dusty red pickup appeared on the county road.
It moved slowly, pulling a small trailer carrying a portable welder.
Claire shaded her eyes.
“Is that Walter?”
Ethan's jaw tightened.
Walter Briggs had worked as a farm-equipment mechanic for forty-six years.
He had repaired combines when their most advanced electrical component was a headlight.
He had rebuilt engines in fields, welded cracked frames during blizzards, and once driven through a flood to rescue a tractor belonging to a man he disliked.
At seventy-two, Walter was officially retired.
Unofficially, half the county still called him whenever modern machinery did something nobody understood.
Daniel had trusted him.
Ethan didn't dislike Walter.
He simply didn't want another opinion.
Not now.
Not with two factory technicians already surrounded by laptops, digital meters, service manuals, and replacement parts.
Walter parked near the trucks.
He climbed out slowly.
Age had bent him slightly at the shoulders, but his hands remained broad and steady. He wore faded overalls and a gray work shirt. A white mustache covered his upper lip.
“What are you doing here?” Ethan asked.
“Your mother called.”
Margaret didn't apologize.
“I asked him to bring the welder.”
“For what?”
“In case we need it.”
Blake glanced toward Walter.
“You with another dealership?”
Walter looked at the logo on Blake's shirt.
“No.”
“Independent?”
“Retired.”
Blake nodded politely.
“We're dealing with a network-control issue.”
Walter looked up at the combine.
“Seems like you're dealing with a machine that won't run.”
Lucas almost smiled.
Blake didn't.
“We have factory diagnostics connected.”
“Good.”
Walter walked toward the combine.
Ethan followed.
“They've already checked the mechanical systems,” Ethan said.
“Didn't say they hadn't.”
“They replaced sensors.”
“I see the boxes.”
Walter continued around the machine.
He didn't ask to see the diagnostic codes.
He didn't touch the laptop.
He simply looked.
At the rear, he stopped.
He studied the exhaust housing.
Then he walked along the left side and crouched near the engine compartment.
“What are you looking for?” Claire asked.
“Nothing yet.”
“That doesn't make sense.”
“Most useful things don't until you find them.”
Walter continued around the combine.
When he reached the ground beneath the rear service platform, he stopped.
The soil was pale and powdery after weeks without rain. Wheat chaff had collected beneath the machine.
Tire marks crossed the dust.
Walter lowered himself carefully onto one knee.
He touched the dirt with two fingers.
Then rubbed them together.
Blake stepped closer.
“Oil?”
Walter didn't answer.
He examined the dust again.
Near the center of the darkened patch were tiny green specks.
Mixed among them were black marks no larger than grains of pepper.
Walter looked beneath the combine.
Then back at the ground.
Then underneath the machine again.
“Has anyone moved it since it shut down?”
“No,” Ethan said.
Walter pointed toward the dirt.
“What do you see?”
Ethan crouched beside him.
“Dirt.”
“Anything else?”
“Chaff.”
Walter touched one green speck.
“This didn't grow here.”
Lucas knelt beside him.
He picked up a speck and held it in the sunlight.
“Copper.”
Walter nodded.
“And these black marks?” Lucas asked.
Walter picked one up.
“Carbon.”
“Maybe,” Walter said.
He looked toward the lower engine frame.
“Or evidence that electricity has been taking a road it wasn't supposed to take.”
Blake folded his arms.
“Battery voltage is good.”
“Where did you test it?”
“At the batteries.”
“Under load?”
“Static and during startup.”
Walter looked at the combine.
“When does it stop?”
“When the separator and feeder systems engage.”
Walter nodded slowly.
“That's when vibration increases.”
Blake's expression changed.
“We tested the charging system.”
Walter stood.
“Your machine has more computers than the building where I went to school.”
“What’s your point?”
“My point is that every one of those computers needs the same thing before it can disagree with the others.”
Lucas looked at him.
“A stable ground.”
Walter smiled faintly.
“Exactly.”
The Evidence in the Dirt
Blake shook his head.
“We checked ground resistance.”
“With the machine off?”
“Yes.”
Walter pointed toward the copper dust.
“That tells you how it behaves while resting.”
He rubbed the particles between his fingers.