Wilkie Collins 
Haunted Hotel A Mystery of Modern Venice 

Is there no explanation of the mystery of The Haunted Hotel? Is The Haunted Hotel the tale of a haunting – or the tale of a crime? The ghost of Lord Montberry haunts the Palace Hotel in Venice – or does it? Montberry’s beautiful-yet-terrifying wife, the Countess Narona, and her erstwhile brother are the center of the terror that fills the Palace Hotel. Are there malefactions at the root of the haunting – or is there something darker, something much more unknowable at work? (Goodreads)