”This film, based on a stage play by Edgar Wallace, is one of those traditional British murder mysteries set in an enormous aristocratic mansion with all kinds of supercilious people, suspicious servants, stupid detectives, and maidens in distress. But it is by no means as corny as it sounds. The film is dominated by the powerful presence of Helen Haye, an actress with the cutting edge of a diamond blade, who lashes everyone in sight with her reproving tongue.”