The Lea family were among the largest flour mill operators at the Brandywine Falls, north of Wilmington, Delaware, since the 1770s, when Thomas Lea (1757–1823) joined in partnership with Joseph Tatnall (1740–1813). The album contains considerable genealogical information on the Lea family, as well as thirty-eight silhouette portraits of members of the Lea and related families. These include family names such as Tatnall, Baily, Bellah, Warner, Pusey, and Rodman.