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.

Papers of several family members, consisting mostly of correspondence. Collection consists mainly of papers of Cuyler Reynolds and Dexter Reynolds.

Will Hicok Low (1853-1932) was born in Albany, New York, and became an artist, muralist, and writer. This collection includes correspondence, personal papers, photographs, and reproductions of his work.