Auxiliarily -

But Elias knew the truth: it was just the auxiliary doing what the main forgot it needed.

Elias laughed. "I'm just the auxiliary." auxiliarily

But boredom has a way of sharpening peripheral vision. But Elias knew the truth: it was just

Elias stayed on that island for another ten years. He never again lit the main beacon except in emergencies. But he repaired the foghorn's backup circuit. He trained two younger keepers auxiliarily. He kept a manual log that the automated system couldn't corrupt. auxiliarily