Miss Marple at an Italian finishing school with Americans Ruth Van Rydock and Caroline "Carrie" Louise Serrocold. While Miss Marple is described as 'an old lady' in many of the stories, her age is mentioned in "At Bertram's Hotel", where it is said she visited the hotel when she was fourteen and almost sixty years have passed since then. Excluding "Sleeping Murder", 41 years passed between the first and last-written novels, and many characters grow and age. An example would be the Vicar's nephew: in "The Murder at the Vicarage", the Reverend Clement's nephew Dennis is a teenager; in "The Mirror Crack'd
Miss Marple also has a remarkable ability to latch onto a casual comment and connect it to the case at hand. In several stories, she is able to rely on her acquaintance with Sir Henry Clithering, a retired commissioner of the Metropolitan Police, for official information when required. Miss Marple never married and has no close living relatives. Her nephew, the "well-known author" Raymond West appears in some stories including "Sleeping Murder" and "Ingots of Gold", which also feature his wife Joan, a modern artist (though prior to their marriage she is referred to as "Joyce Lemprière", in "The Thirteen Problems" stories).