Catherine C. Irving (1884-1982) was the wife of Alexander Duer Irving (1873-1941). He was an aide to President Woodrow Wilson (1856-1924) at the Versailles peace treaty negotiations in 1919 after World War I. The letter from Irving to W.W. Laird (1910-1989), she recounts an anecdote about Col. H.A. du Pont (1838-1926).

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.

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 collection consists of five letters from du Pont to Gustav Schelle (1845-1927) and one from Schelle. The letters mostly express personal friendship and deal indirectly with Schelle's writings on the Physiocraps and du Pont de Nemours.

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. Two typed letters from du Pont to J. Simpson Dean (1898-1978) and Paulina du Pont Dean (1903-1964) concerning the new private road beginning at the intersection of the two private roads to Eleutherian Mills and Nemours residences.

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. On November 10, 1915, du Pont was honored with a dinner put on by the younger men of the family. The collection includes a mailing list for a booklet to commemorate the dinner, along with a booklet which lists those attending, describes the presentation of the gift, and includes the remarks prepared by du Pont.

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 Benjamin W. Austin (-1898) secretary of Trinity Historical Society in Dallas, Texas from 1885 to 1894, expressing thanks for honor conferred by "your Association."

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.

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. In February 1889, du Pont wrote General James H. Wilson (1837-1925) about certain Civil War battles and their mutual commander (at different times) George Crook (1828-1890).

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 collection contains a letter du Pont wrote to Howard M. Jenkins (1842-1902), editor of Friends intelligencer (Philadelphia) concerning the nomination of John Hunn (1849-1926) as the Republican candidate for governor of Delaware.

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. On July 21, 1896, du Pont wrote a letter to John C. Higgins (1838-1924) congratulating him on his nomination for Governor of Delaware for the Republican Party.

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 collection contains two photocopied letters of du Pont to President Benjamin Harrison (1833-1901) concerning the Republican Party in Delaware prior to the state elections.

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 collection contains two photocopied letters from du Pont to Daniel Ammen (1820-1898), a Naval officer and Chief of the Bureau of Navigation.

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 leather-bound scrapbook serves as a testimonial to the memory of du Pont. It includes records of the West Point class of 1861, the military record of du Pont, his award for gallantry in action, his obituary from the DuPont Company annual report, and photographs of H. A. du Pont and scenes of West Point in 1861 and 1961.

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 collection contains miscellaneous material related to du Pont, including a letter, Christmas cards, invitation to meet the Representatives of the Societies of the Cincinnati, and invitation from the Secretary of the Navy to the unveiling of the statue of Samuel Francis du Pont (1803-1865).

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 collection consists of a photocopy of du Pont's will, dated September 5, 1923, and a codicil of January 5, 1926.

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 collection consists of a survey and two letters related to du Pont's Deep Water Point Farm in Salem County, New Jersey.