The dark-eyed woman in the long black gown was first seen in the 1970s, standing near a fireplace. She was sad and translucent, present and absent at once. Strange things began to happen in the Santa Fe hotel where she was seen. Gas fireplaces turned off and on without anyone touching a switch. Vases of flowers appeared in new locations. Glasses flew off shelves. And in one second-floor suite with a canopy bed and arched windows looking out to the...