297 items, dated from 1890 to 2000, Boxes 165-167.

This series contains typescripts, advertisements, photocopies, tear sheets, and postcards for three book projects that John Margolies had proposed, but did not reach publication.

Gas (a book proposal to Taschen)

Dreams and nightmares:hotels in America

Main Street, a celebration of America's free enterprise System.

The R. Kenyon Kilbon collection consists of drafts and research relating to his unpublished history of RCA research. Most importantly, it contains files from the papers of Research Director Ralph R. Beal that provide insight into RCA’s research and development during the 1930s and 1940s.

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.