Not every vial fixed what ached. Some of the tinctures returned memories sharper, and those were brutal in a different way. People sometimes learned the kind of truth that made them leave or break or rebuild. Pharmacyloretocom New, Mr. Halvorsen would say, was indiscriminate in its clarity. It merely made room for what already wanted to be remembered.

Evelyn returned several times, though she had little cause, because the pharmacy had become a place to test the elasticity of memory—how far it could stretch without snapping. The proprietor—whose name she learned by degrees: Mr. Halvorsen—never asked what people sought beyond the words they offered. He simply measured out dusk and sealed it with coin-colored ink.

“It’s not about making everything the same,” she said. “It’s about letting people keep their own things.”—an idea that sounded plaintive and necessary and utterly unscalable.