No one remembered when Kestrel Hill had last held a light. The hill was a crescent of scrub and granite that guarded the town’s east side, and children used to dare one another to run its crest at dusk. But for as long as anyone in Marroway could name, the hill had been dark—an unlit silhouette against the sea. So when a pale, steady glow hung above its summit one autumn evening, people opened windows and watched with an attention normally reserved for storms and funerals.