A Sicilian romance - Ann Radcliffe

A desolate castle hides a family's shameful secrets ...

On the rocky northern shores of Sicily stands a lonely castle, the home of the aristocratic Mazzini family. The marquis of Mazzini has remarried and gone away to live with his new wife, abandoning his two daughters - sweet-natured Emilia and lively, imaginative Julia - to wander the labyrinthine corridors alone. His only involvement with their lives is to arrange a marriage between Julia and the cruel Duke de Luovo, even though she loves another.

But that is not the end of Julia's troubles. Strange lights and unearthly groaning noises are coming from parts of the castle that have been locked up for years.
Is it occupied by some terrible supernatural power? Or do even darker secrets lie within its depths?