The Frick family papers includes papers of socially prominent Baltimore and Washington, D.C. families, primarily from the mid-nineteenth to the early-twentieth century. The three main families are the Fricks, Poultneys, and Turnbulls, but scattered items from related Sloan, Carroll, Denison, Brown, Ramsay, and Spense families are here as well. The papers include correspondence, genealogies, accounts, land papers, diaries, travel diaries, and recipe books.

The papers in the Rieman Family Collection span over 150 years, and document the genealogical history of the Rieman Family in Baltimore. The materials consist of legal papers, wills, land deeds, real estate records, plats and blueprints, and records of the genealogical research conducted by various Rieman family members during the twentieth century.