The Atterbury family, specifically brothers John Guest Atterbury (1811-1887) and William Wallace Atterbury (1823-1911), and John's son William Wallace Atterbury (1866-1935), were descendants of a London bank house representative and Huguenot family. John was a lawyer and later a Presbyterian minister, as was William. The younger William was a career officer for the Pennsylvania Railroad. The Atterbury family papers consist primarily of the personal papers of the younger W.W. Atterbury as preserved by his family, along with a few items from his father and uncle.

Francis Bannerman Son was a major purveyor of military goods to sportsmen and collectors in New York City over three generations. The collection consists of Bannerman family's personal papers, correspondence, travel diaries, and financial documents concerning Bannerman Island.

Carolyn Mann Irving (1891-1987) was the wife of Evelyn du Pont Irving (1886-1968), nephew and one of the heirs of the prominent author Washington Irving's estate. The collection consists of forty-two prints (engravings or lithographs) and two photographic prints which were collected by Carolyn M. Irving. Subjects include animals; Andrew Jackson political cartoons; battle and war images; du Pont related images; European landscapes, town scenes and cathedrals; fashion and religious images.

Francis Gurney du Pont (1850-1904) was the youngest son of Alexis I. du Pont (1816-1857) and Joanna Smith du Pont (1815-1876), and grandson of Éleuthère Irénée "E.I." du Pont (1771-1834), founder of E.I. du Pont de Nemours & Company, a chemical company more commonly referred to as the DuPont Company. The collection consists primarily of correspondence from du Pont to his wife, Elise Wigfall Simons (1849-1919), but include items from other family members, as well as a journal of du Pont's, manuscripts written by him, and plays and novels by Alice Simons (1849-1891).

Francoise Robin du Pont (1748-1841) was the second wife of Pierre Samuel du Pont de Nemours (1739-1817) a promienent French political economist, writer, publisher, and public administrator. The collection contains letters from du Pont to Baron (1757-1830) and Baronne Desmousseaux de Givre (1768-1843). The letters contain discussion of religious societies, his trip to Italy, and personal matters.

H. Rodney Sharp (1880-1968) was a historic preservationist and husband of Isabella du Pont Sharp (1882-1946), a descendent of the founders of E.I. du Pont de Nemours & Company. The collection contains typed transcripts of letters written by Sharp while the Sharp family, friends, and children's nurses traveled around the world.

Henry Belin du Pont (1898-1970) was a research engineer with General Motors and the vice president of E.I. du Pont de Nemours & Company from 1939 to 1963. This collection contains correspondence from several generations of the family from the early nineteenth through the twentieth century, including Francis Gurney Smith (1784-1873), Elizabeth (Eliza) MacKie Smith (1787-1861), Joanna Smith du Pont (1815-1876), Frances du Pont Coleman (1838-1902), Eleuthera "Ella" du Pont Bradford (1848-1906), Eleuthera Bradford du Pont (1873-1953), Alicia Bradford Maddox (1875-1920) and Phoebe George Bradford (1794-1840).

Isabella du Pont Sharp (1882-1946) was a descendent of the founders of E.I. du Pont de Nemours & Company. The collection contains typed transcripts of letters written by Sharp to her sister, Margaretta du Pont Carpenter (1884-1973) while the Sharp family, friends, and children's nurses traveled around the world. The letters are filled with details about traveling, sightseeing, hotels, shopping, meals, and clothing.

Joshua Gilpin (1765-1841) was a merchant and paper manufacturer. Article written by historians Harold B. Hancock and Norman B. Wilkinson, "Joshua Gilpin: an American manufacturer in England and Wales, 1895-1801," based on Gilpin's journals.

Merchant and paper manufacturer Joshua Gilpin (1765-1841) established the first paper mill in Delaware near Wilmington in partnership with his brother, Thomas (1776-1853), and uncle, Miers Fisher. Gilpin traveled extensively abroad from 1795 to 1801. The collection consists of 62 pocket journals and notebooks, the bulk of which date from Gilpin's European tour from 1795 to 1801.

Keith Reeves Rodney (1875-1956) was a metallurgist at the Fairmount Steel Company in Philadelphia. His diaries document his 1905 European tour of a number of steel mills and machine shops. He visited Italy, France, Germany, and England.

Margaretta “Meta” du Pont Coleman (1862-1938) was a descendant of Pierre Samuel du Pont de Nemours (1739-1817) who founded the E.I. du Pont de Nemours & Company with his son Eleuthère Irénée du Pont (1771-1834) in 1802. The E.I. du Pont de Nemours & Company is a chemical company more commonly referred to as the DuPont company. The Margaretta E. "Meta" du Pont Coleman Papers primarily consist of family correspondence collected by Meta Coleman.

May du Pont Saulsbury (1854-1927) was a leading hostess in Washington, D.C. during the Wilson administration, philanthropist, and wife of Senator Willard Saulsbury (1861-1927). The journal covers the couple's summer trip to Europe in 1919, coinciding with the signing of Treaty of Versailles.

The Morris family of Philadelphia were brewers, merchants, land speculators, manufacturers, and prominent participants in public affairs. This collection contains fourteen albums of photographs and postcards of foreign scenes between 1881 and 1906.

Pamela Cunningham Copeland (1906-2001) and Lammot du Pont Copeland (1905-1983) were active in the land conservation movement, cultural institutions (including both the Hagley and Winterthur Museums), and local civic and philanthropic work. The collection contains photographs of Pamela and Lammot du Pont Copeland and family members. Many of the pictures document the couple's various activities and philanthropic endeavors.