The Abbe (Abbey) family papers include records relating to the Abbe family. The Abbe family, which consisted primarily of Richard T. Abbe, his wife Helen Woods Abbe, and their daughter Olive Abbe Jones, corresponded with many family members and business associates before and during the Civil War. This collection contains deeds, legal records, correspondence, business records, and other papers of the family.

Collection consists of correspondence concerning Van Kleeck genealogy, 1946-1965; correspondence with Kenneth Hasbrouck on history and education, 1951-1956; and printed materials on New York State and Albany history, 1950-1965.

The collection contains correspondence and publications of Hermann Rauschning.

The Socialist Party of the United States of America Dover, New Hampshire Local Records contain records that document the range of activities of the Local. Records include correspondence that highlight the contacts of the local and its place within the broader Socialist Party movement in the United States.