Bellewether by Susanna Kearsley

A split story between a curator who is experiencing ghostly visits while at work at a Pre-Revolutionary War home now being turned into a museum and the true story of a mysterious French captured soldier and the daughter of the home where he has been garrisoned. Charley is coming back home but not into the welcome arms of her grandmother who has denounced her part of the family. She is coming home to curate the Bellewether estate and quietly taking care of her niece who has just lost Charley's brother, her father. Lydia lives with her father and brothers at Bellewether during the French/Indian War. As British subjects, her father is duty bound to house two captured French officers who prove to be a distraction. This distraction becomes the basis for the legend of the lantern wielding ghost who appears to many at the estate. Historical fiction that draws you fully in and puts you into the house and its inhabitants. The ghost angle is handled well so that it aids in solving the mystery rather than scaring you silly.