The historical significance of the Cuckolds ledge in Maine dates back to 1874. Located at the entrance of Boothbay Harbor, a busy East Coast port, this seven-acre, fifteen-foot-high rock ledge was easily hidden at night and by ocean waves, fog, or snowstorms. Initially it was outfitted with a tripod and day-board, then a fog signal station, and finally a lighthouse. When the power of automation replaced the knowledge and skill of the traditional lighthouse keeper, the Cuckolds Lighthouse was left on its own to battle the elements and warn the approaching mariner of the dangers lurking only...