The Pruyn Family Papers contains documents relating to three consecutive generations of the John Pruyn Family, along with genealogies and personal papers of more distant family relations. An autograph collection of presidents, statesmen, and local historic figures is included. The ownership of 43-45 North Pearl Street is documented from the first sale in 1679 to the last in 1968. The estates of Eleanor Erving, Justine Bayard Erving and Van Rensselaer Pruyn are also documented.

The Ten Eyck/Bronk Family Papers contain the records of the descendants of Jacob C. Ten Eyck (1705-1793), and primarily contain documents relating to family property and financial concerns.

Thomas Worth Olcott (1795-1880) was born in Hudson, Columbia County, New York, to Josiah and Carolina Worth Olcott. Olcott eventually became president of the Mechanics and Farmer Bank in Albany, New York, and served on the boards of the Albany Law School and the Dudley Observatory, among others. This collection contains estate records, correspondence, newspaper clippings, bills, account books, photographs, scrapbooks, and genealogical information.