Consists of the family papers of former DuPont CEO Lammot du Pont Copeland (1905-1983) and his wife Pamela Cunningham Copeland (1906-2001). The Copelands' papers document the lives and interests of a wealthy American couple in the twentieth century. In particular, the papers of Pamela C. Copeland are an important source of information about the public activities of women in the areas of historic preservation, gardening and horticulture, and philanthropy.

Edward Graham Jefferson (1921-2006) was a research chemist and chief executive officer of E.I. du Pont de Nemours & Company. Jefferson's papers consist of his "personal" business files, and do not include his official correspondence as CEO of the DuPont Company. The papers primarily reflect Jefferson's "Head of State" role at DuPont and his membership on the boards of numerous business, trade, and educational organizations. The papers have been arranged in three series: DuPont Company and personal activities, Outside board memberships, and Speeches.

Henry Algernon du Pont (1838-1926) was a military officer, a politician from Delaware, and vice president of E.I. du Pont de Nemours & Co. The letter from du Pont to F.G. [Frederick G.] Larned (1860-1937) of Poland, New York, explains the position and duties of the man he wishes to employ on his farm at Winterthur.