Éleuthère Irénée du Pont de Nemours (1771–1834) was a French American chemist and industrialist who founded the gunpowder manufacturer, E.I. du Pont de Nemours and Company. This ledger documents his accounts current between the years 1814 and 1818.

William Young (1755-1829) was a Philadelphia bookseller and later a manufacturer at Rockland, Delaware. Three surveyor's plats marking the route of canal through White-Hall estate, William Young's property in Philadelphia.

William Young (1755-1829) was a Philadelphia bookseller and later a manufacturer at Rockland, Delaware. Miscellaneous papers including genealogical and biographical information, letter, and paper samples produced by Young.

William Young (1755-1829) was a Philadelphia bookseller and later a manufacturer at Rockland, Delaware. This item is a photocopy of letter of introduction from William Young to Charles and Victor du Pont for Frederick Rapp.

William Young (1755-1829) was a Philadelphia bookseller and later a manufacturer at Rockland, Delaware. Letters to Young regarding paper business, two ship bill of lading, and two legal documents on paper produced by Young.

The Young and McAllister families were prominent families in the Associate Presbyterian community in Philadelphia. William Young (1755-1829) was a Philadelphia bookseller and later a manufacturer at Rockland, Delaware. John McAllister Jr. (1786-1877) ran the Philadelphia optical firm of that same name. This small collection of papers relate to the Young, McAllister, and Warner families. Approximately half of the material are correspondence from John Young, William Young, John McAllister Jr., and Joseph T. Warner; the other half are miscellaneous documents related to the families and businesses they were involved with including Rockland Manufacturing Company and McAllister Spectacle Company.