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.

Charles Mattathias Jacobs (1850-1919) was a British tunneling engineer. This is a digital copy of a painting of Jacobs at approximately sixty years of age, in court dress.

Ernest du Pont (1880-1944) and his elder brother Francis Irenee du Pont (1873-1942) founded the U.S.F. Powder Company in 1919, which produced flashless cannon powder. This item is a cabinet card photograph of Ernest du Pont (1880-1944) as a young child.

Joseph Horn (1861-1941) and Frank Hardart (1850-1918) founded Horn & Hardart, a food service company, in 1888. In 1902, Horn and Hardart opened their first Automat in Philadelphia. The first New York City Automat opened in 1912, and other locations followed in both cities. The Automat became a huge success in Philadelphia and New York City, daily serving hundreds of thousands of people in its heyday. This item is a framed portrait photograph of Joseph Horn from around the 1930s.

This reproduction (copied from an original cabinet card) is of Lea Pusey (1820-1896) photographed through a large block of clear ice. Pusey created the plate process, a method to make commercial ice and was the founder of Diamond Ice Company.

Mary A. Ferraro (b. 1851) is presumably the mother of Pierre Ferraro (b. 1878) and Eugene Ferraro, both of which worked for the DuPont Company and were all residents of Walkers Bank at Hagley Mills. This item is a portrait of a woman identified only as the mother of Ferraro.

Pierre Samuel "P.S." du Pont (1870-1954) was the great grandson of Eleuthère Irénée du Pont (1771-1834), founder of E.I. du Pont de Nemours & Company, and that company played a major role in P.S. du Pont's life. He is most well-known for developing the preeminent botanical gardens, Longwood Gardens in Kennett Square, Pennsylvania. This item is a matted portrait of P.S. du Pont, autographed on front beneath image area.

The architectural firm of Victorine & Samuel Homsey, Inc. was founded in Wilmington, Delaware, in 1935. It was one of the first husband-and-wife architectural practices in the U.S.