"At the Villa Rose" by A. E. W. Mason is a detective novel published in 1910. When a wealthy widow is murdered and her jewels stolen in Aix les Bains, suspicion falls on her young English companion, who has mysteriously vanished. Inspector Hanaud of the French police agrees to investigate at the urging of a desperate Englishman who believes in the woman's innocence. The case involves spiritualism, séances, and deception, leading Hanaud into a complex web of trickery and crime. (This is an automatically generated summary.)