This small collection contains an account by Gentieu entitled "The First Fifty Years at Carney's Point" (1891-1941). The history was written as a series of articles from the Carney's Pointer newsletter covering the first fifty years of the plant's operations. Gentieu wrote the twenty-five chapters betwen 1951 and 1952.

There are two personal letters from Alexis Felix du Pont to Gentieu and a letter from William Winder Laird to Gentieu regarding a history Gentieu wrote about Mt. Salem Church in Wilmington, Delaware.

There is a list of Pierre Gentieu's photographic collection, which photographs make up the Pierre A. Gentieu Brandywine River Valley photographs (Accession 1970.001). The original glass negatives are the property of the Delaware Historical Society.

Also included is Samuel Brown's "Recollections of a Conversation I Had with the Late Mrs. Admiral du Pont about 1885 to '87," relating to the Brandywine Manufacturers Sunday School. Sophie M. Du Pont (1810-1888) and her sister Eleuthera du Pont Smith (1806-1876) were teachers at the school; their sister Victorine du Pont Bauduy (1792-1861) was superintendent. The Brandywine Manufacturers Sunday School was organized in 1817 as a non-sectarian school for the children of the local factory workers, with instruction in reading, writing, arithmetic, and religion. Éleuthère Irénée du Pont (1771-1834), founder of the DuPont Company, was one of its chief subscribers; the school building was located on his property.