Subject(s): Hargreaves, Emily -- Lady (Fictitious character) -- Fiction. | 79 | Upper class -- England -- Fiction. | Murder -- Investigation -- Fiction. | Secrecy -- Fiction. | Fiction -- Mystery & Detective -- Historical | Fiction -- Mystery & Detective -- Women Sleuths | Fiction -- Mystery & Detective -- International Crime & Mystery | Antiquities. | Italy -- Antiquities -- Fiction. | Italy. | England. | Italy -- Vesuvius. | Vesuvius (Italy) -- Fiction. | Historical fiction. | Detective and mystery fiction. | Fiction. | Mystery fiction.