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From 1947, "Moss Rose" stars Peggy Cummins, Victor Mature, and Ethyl Barrymore.

Cummings plays Belle Adair, a dance-hall girl who sees a strange man (Mature) leave the room of one of her friends. The woman has been murdered, a moss rose sitting in an open Bible next to her. Belle sets out to find the man, one Michael Drego.

Once she does, she blackmails him. He refuses to give in, so she nearly identifies him when asked by the police chief (Vincent Price) which man she saw. Drego is able to signal her that she wins.

Belle is a little like Eliza in Pygmalion - turns out it's not money this petite Cockney wants. She wants to be a lady, and asks Drego to take her to his country home for a visit. Not sure how he will explain her presence - since he has a fiancee - Drego gives in, says she helped him with something, and is stopping by for a few days.

Michael's mother (Ethel Barrymore) is obsessive about her son, from whom she was separated while he lived with his father in Canada, but she likes Belle. Michael's fiancee feels a bit threatened by her. While Belle is at the house, there is another murder, with another moss rose in an open Bible.

Pretty good, with a vivacious performance by Peggy Cummins. You never for one minute think of her as an evil blackmailer. Mature for me wasn't aristocratic and smooth enough for the character of Michael. He gave a low-key performance, so he was aware his persona had to change from his street-wise roles. However, you can take a man off the street, but you can't take the street out of a man. Ethel Barrymore gives a strong performance.

Nice Victorian atmosphere and lovely costumes. And yes, Peggy Cummins is the same actress from "Gun Crazy!"