Henry Miller (1845-1926) was first employed at the Brandywine Works of E.I. du Pont de Nemours & Company. In 1922, he was one of the oldest surviving employees when he was interviewed by Alfred I. du Pont (1864-1935). In the interview, Miller describes the layout of the Brandywine Works as it changed over time, as well as the various apparatus and processes used in the manufacture of gunpowder and its constituent ingredients.

Walt Biddle (1925-1995) was a gardener in the household of Louise du Pont Crowninshield (1877-1958) and Francis B. Crowninshield (1869-1950) at Eleutherian Mills in Greenville, Delaware. In his oral history interview transcript, Biddle describes the Crowninshields and life at Eleutherian Mills in the 1940s and 1950s.