Margaret Rutherford is a fictional character created by British author Agatha Christie. She is an amateur detective known for her keen observational skills and sharp intellect. Often portrayed as a quirky and endearing elderly woman, Margaret is featured in several of Christie's novels, including "Mrs. McGinty’s Dead" and "The Moving Finger." Rutherford's character is notable for her ability to solve complex mysteries that baffle the police. Her charm and determination make her a beloved figure in the world of detective fiction, showcasing the theme that intelligence and resourcefulness can come in any age.