But Elias knew the truth: it was just the auxiliary doing what the main forgot it needed.
The trawlers that night saw a beam that seemed older than electricity. They called it the Ghost Light.
Then the automated beacon arrived.
For the first month, he raged. The new light clicked on and off without him. The foghorn bellowed by clockwork. He sat in his armchair, watching dust settle on his logbook. Auxiliarily , he learned, meant being the second string on a team that never played.
But boredom has a way of sharpening peripheral vision.
"They don't need you full-time anymore," said the letter from the Maritime Authority. "But we'll keep you on auxiliarily ."
He was invisible again.
One day, the biologist said, "You know, you're the only reason this island still feels alive."