The Copycat Mystery (The Boxcar Children Series #83)

The Alden children take a trip back in time when their Aunt Jane surprises them with a visit to Wagner Farmhouse, an old Victorian house that has been turned into a museum. When strange things happen at the museum, the Aldens wonder if the ghost of practical joker Horace Wagner really haunts the house. Or is someone trying to destroy the museum's chances for success?