In the novel A Murder is Announced, Mrs Pusey is mentioned. She runs the paper shop in St. Mary Mead. She had a nephew who travelled on an ocean liner. He came back with stolen goods and got her to dispose of them.
When the police came asking questions, her nephew tried to bash her over the head to stop her from talking.
Diana Harmon is of the opinion that Mrs Pusey's nephew is a parallel of Patrick Simmons. However, Miss Marple did not confirm this.