Mary Hemphill Bush Rieffel (1908-1991) was a nurse, philanthropist, and descendant of the du Pont family, who founded E.I. du Pont de Nemours & Company in 1802, a chemical company more commonly referred to as the DuPont Company. Mary Hemphill Bush Rieffel's collection documents her academic progress, travels, and family life growing up, as well as her own family as an adult. The collection is organized into two series: Family papers and Family photographs. The material dates from 1845 to 1995.