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.

John Watson (1774-1864), a Quaker, worked as a land surveyor in Pennsylvania during the early nineteenth century. The collection consists of five volumes relating to the construction of the Delaware Division of the Pennsylvania Canal.

Penn Virginia Corporation was an oil and gas company, incorporated as the Virginia Coal & Iron Company on January 6, 1882. It was one of many firms established by a group of interrelated entrepreneurs headed by John Leisenring (1819-1884), a Mauch Chunk, Pennsylvania, civil and mining engineer. The name changed to Penn Virigina Corporation in 1967. The records of Penn Virginia Corporation cover the development and operations of the Virginia Coal & Iron Company, a large southern Appalachian land company, with some information on its immediate neighbors and local support facilities.

The Pusey & Jones Corporation were shipbuilders, founders, and machinists of Wilmington, Delaware, which later expanded into papermaking machinery manufacturing. The collection is a plat of the property around Pusey and Jones Company plant in Wilmington, Delaware.

This series includes personal accounts; student copy books and notes on the subjects of botany, physics, chemistry, natural history, Latin, and horticulture; botanical notes, including an essay on the culture of American corn; memoranda on the manufacture of gunpowder and the construction of the Brandywine mills; memoranda on American manufactures and the tariff; and notes on travels to Pittsburgh (1806) and Angelica, New York (1808).

Also included are papers concerning the South Brandywine Rangers (a militia unit during the War of 1812); legal agreements concerning the acquisition of property for the Delaware powder mills and the importation of Merino sheep; du Pont's shares in the Wilmington & Philadelphia Turnpike Co.; rules and regulations of the Philadelphia & Wilmington Steam Boat Co. (1829); patents and lists of lands owned by du Pont near Pittsburgh and in Virginia; estate papers of Dr. Pierre Didier; and a letter from Louis McLane regarding information from Delaware for his census of manufactures.

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.

The Pennsylvania Railroad Company was the largest railroad in the United States in terms of corporate assets and traffic from the last quarter of the nineteenth century until the decline of the Northeast's and Midwest's dominance in manufacturing. This unpublished report is a survey containing an analysis of seven large tracts near the company's lines in western New York State that were available for factory sites, including labor availability, population, climate, energy, and water supply.

Route 1 is a major north-south U.S. highway extending from Florida to Maine. The plat depicts a small portion of Route 1 between Hamorton and the Anvil Inn, including P.S. du Pont's (1870-1952) Longwood Gardens.