Outside, at dusk, a single streetlight blinked on. Its light was small and sufficient. Someone down the block paused under it and looked up at the sky, thinking of a song they had once sung. In the dark between the buildings, the world kept its small combustions of memory alive, and the last light — when tended — never quite went out.

Ada could have closed the window and stowed the device in a drawer. Instead, she carried it to the small park across the street where an old woman fed pigeons. The woman’s hands were thin as paper and full of knuckles the color of tea. Ada sat beside her and, without thinking, asked, “If you could live in one memory forever, which would you choose?”

People began to notice small changes in Ada. She laughed more easily. She fixed things more quickly and with less fuss. Once, when a neighbor left in haste and dropped a scarf into the stairwell, Ada ran after them, returning it with a look that asked, silently, “Are you keeping the last light?” The neighbor nodded, puzzled and grateful, and went on.

That night, Ada did not feel the pinch of indecision that had marred her earlier choices. She pressed the BBM 22001 to the base of the lamp and accepted the final story.