Alfred Irénée du Pont (1864-1935) was the eldest son of E.I. du Pont (1829-1877). He joined the family gunpowder firm in 1884. This item is portrait of Alfred I. du Pont, dated September 1881.

Alfred Victor du Pont (1900-1970) was a partner in the Wilmington, Delaware, architectural firm of Massena and Du Pont, and he was the third child of Alfred I. du Pont (1864-1935) and his first wife Bessie Gardner du Pont (1864–1949). This small collection includes both business and personal papers. The largest portion is made up of Alfred V. du Pont's correspondence with his father, Alfred I. du Pont.

Alfred Irénée du Pont (1864-1935) was the eldest son of E.I. du Pont (1829-1877). He joined the family gunpowder firm in 1884. Gabrielle Shubrick Crofton (1835-1894) was the daughter of Alfred I. du Pont's first cousin, Julia Sophia du Pont (1806-1882) and Irvine Shubrick (1797-1849). This collection consists of two individual portraits, one of Gabrielle Shubrick Crofton and the other of Alfred I. Du Pont.

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.

The Hiebler family papers include documents pertaining to four generations. The bulk of the collection consists of letters written by Alfred I. du Pont to his grandsons Bayard Hiebler and Benno Hiebler, dated 1927 to 1935.

Alfred Irénée du Pont (1864-1935) was the eldest son of E. I. du Pont (1829-1877). He joined the family gunpowder firm in 1884, eventually becoming co-owner. He was an accomplished musician who composed many scores, however, he destroyed most as he became deaf. Only six survive. This compact disc contains six sound recordings of scores composed by Alfred I. du Pont. Performed by the New Tankopanicum Orchestra, conducted by Brian Cox, Published in Greenville, DE : Tank CD p1993. Includes program notes (1 folded sheet [6] p. : ill.) inserted in container.

At the time of his death, William G. Ramsay (1866-1916) was chief engineer, a director and vice president of E.I. du Pont de Nemours & Company. This is a small collection of mostly unidentified snapshots possibly taken in the Pacific Northwest showing boats and logging subjects.