Ruth Ellen du Pont (1922-2014) was the youngest daughter of Henry Francis and Ruth Wales du Pont. After attending the Foxcroft School, she entered Vassar College and later received her master’s degree in education from Yale University where she became a research associate at Yale’s Child Study Center. In 1947 she married George deForest Lord, Jr. Her biography of her father, Henry F. du Pont and Winterthur: A Daughter’s Portrait, was well received. At the time of her death, she was working on a biography of her mother.