Witness: Witness Archive 2015

In January 1976, the best-selling novelist of all time, the Queen of Crime, creator of Hercule Poirot and Miss Marple, Agatha Christie died peacefully, aged eighty-five. Her grandson, Mathew Prichard, remembers her life. (Photograph: Agatha Christie with her only grandchild, Mathew Prichard, in the 1950s at London airport. Credit: Keystone/Getty Images.)