Eleutherian Mills is the house built by Eleuthère Irénée du Pont (1771-1834), above his gunpowder mills, the E.I. du Pont de Nemours & Company. It served as a home to the du Pont family for generations, the last being Louise du Pont Crowninshield (1877-1958). The collection contains material related to the restoration of the home prior to Crowninshield occupying it. Also included are materials related to a road to the Eleutherian Mills and Nemours residences, repairs to the iron bridge across the Brandywine, and description of E.I. du Pont's garden.

Charles Copeland (1867-1944) was Secretary of E.I. du Pont de Nemours and Company from 1921 to 1935. He also served on the Board of Directors from 1921 to 1942. This small collection primarily consists of scenic views of the Hagley property. The collection has been organized into three series: Brandywine and Hagley areas of Copeland estate; Rolling wheels, and Pierre Gentieu prints.