A lighthouse keeper died, and the town had a problem. No one could stay awake all night.
So they hired ten people, each for one hour.
The first keeper arrived at dusk, inspected the lamp, and found a hairline crack in the glass. She noted it in the logbook: Crack in the northwest pane. Small. Monitor. She polished the lens, trimmed the wick, and left at the end of her hour.
The second keeper arrived knowing nothing except what the logbook said. He read the entry, checked the crack, saw it hadn't grown. He noticed something the first keeper hadn't: a moth had gotten inside the lamp housing. He removed it, noted it, and left.
By the fourth keeper, the logbook had a rhythm. Each entry was a sentence or two. Crack stable. Wick trimmed. Wind from the southeast. Each keeper arrived cold, read what the last one wrote, did their hour, and handed it forward.
The fifth keeper had a theory. The crack, she reasoned, was caused by thermal stress from the wick flame. She wrote three paragraphs about it. She adjusted the wick height to reduce heat on the northwest pane. She was thorough.
The sixth keeper arrived, read the logbook, and went to check the crack. It had grown. Not from thermal stress — the fifth keeper's wick adjustment had changed the airflow inside the housing, creating a pressure differential that stressed the glass in a new direction. The sixth keeper couldn't know the fifth keeper's reasoning. She only knew what the logbook said and what her own eyes showed her. She moved the wick back. Noted it.
The seventh keeper arrived and found the crack stable again.
In the morning, the town council reviewed the logbook. Ten entries. Ten keepers. The lamp had burned all night. Ships had passed safely.
"It works," the council said, surprised.
The harbor master, who had suggested the arrangement, was not surprised. He'd spent forty years watching single night-keepers fall asleep, or get fixated on one problem, or convince themselves a sound was nothing. He'd watched good keepers — smart, dedicated, caring — make decisions at 3 AM that they'd never make at 3 PM. Not because they were careless. Because they'd been staring at the same flame for six hours, and after six hours, you stop seeing what's in front of you. You start seeing what you expect.
"The fresh eyes are the point," the harbor master said. "Not because any one of them sees better. Because none of them has been staring long enough to go blind."
The council member who liked things tidy asked: "But don't they lose something? The first keeper saw the crack form. The sixth keeper only read about it. Isn't the one who was there more qualified to judge?"
The harbor master thought about it.
"The first keeper was more qualified to describe what she saw," he said. "The sixth keeper was more qualified to see what the fifth one couldn't."
The council member frowned. "That feels like a loss."
"It is," the harbor master said. "And also the reason the light stayed on."
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