The Teunis G. Bergen and Bergen family collection comprises the papers of Teunis G. Bergen (1806-1881), as well as the papers of other Bergen family and extended family members. Materials in the collection span the years 1639 to 1893, and primarily document Bergen's role as a major civic and community figure in Brooklyn, as well as his family's history. In addition to his work as a farmer and surveyor, Teunis G. Bergen served on the Kings County Board of Supervisors as Supervisor of New Utrecht, NY, and in 1864, he was elected to the United States House of Representatives as a Democrat to the Thirty-ninth Congress. He was also known for his expertise in genealogy and local history, and published several articles and books on these topics. Highlights of the collection include maps, surveys, and map tracings of various Brooklyn locales drafted by Bergen; extensive materials pertaining to Bergen's research and publishing on local history and genealogy; and research materials on Bergen family genealogy.

The Horsford Family Papers comprises a collection of papers created by various members of the Horsford, Gardiner, and L'Hommedieu families.

The M. Watt Espy papers chronicle the extensive research efforts that led to the creation of the Capital Punishment Research Project and the database known as the Espy File. Espy spent three decades gathering and indexing documentation of legal executions in the United States. His papers contain both primary and secondary sources used to catalog thousands of instances of capital punishment in the United States and its territories since the 1600s. The collection includes material from corrections records, newspapers, county histories, legal proceedings, and books. In addition to the records pertaining specifically to the death penalty, there is also a selection of magazines collected by Espy that cover true crime stories as well as life in the American Old West.

Correspondence, notes, research transcripts, coin photographs and pictures, and original eighteenth century documents, all relating to Douglas’s research into post-1783 U.S. state coinage.

Correspondence, newspapers, pamphlets and scrapbooks of material relating to the career of Thurlow Weed, 1797-1882.

The collection includes letters to Juliett Woodworth (Mrs. Henry Fellows, in 1865) of Penfield, from various members of the Woodworth and Mead families, particularly from Mayfield, Fulton Co., N.Y. and from Michigan. Letters written during the Civil War from William N. Woodworth of the 140th New York Volunteers and Silas W. Allen of the 4th Michigan Battery. Letters from James Moore of the 108th New York Volunteers to John Fellows, Penfield, concerning the Civil War and various personal financial matters. Letters to Henry Fellows (Jr.) concerning financial matters.

Personal and professional papers of the notable literary critic. The collection includes correspondence, manuscripts, notes, journals, photographs, drawings and films, and a collection of signed and annotated books and magazines from Dupee's library.

Boxes 1 and 2 contain about 250 letters, dating from 1780 to 1910, with a concentration of letters between 1800 and 1830. The correspondence is mainly to and from Nathaniel Rochester, with some other family members represented. The papers contain a few letters from well-known national figures, including Henry Clay (two letters, along with material concerning Clay's burial in Box 3 folder 10), James Madison (one letter signed), Albert Gallatin (one document signed), and Alexander Hamilton (one document signed). Other important correspondents include Charles Carroll and William Fitzhugh, Rochester's partners in the 1803 Western New York land purchase. There are also retained copies of Rochester's own letters, written in his own hand along with correspondence from several of his sons, including William B. Rochester, who served as a Congressman. Also included are 17 letters Nathaniel Thrift Rochester wrote to his mother and sisters during a tour of Europe in 1832. Letters dating from the late nineteenth and early twentieth centuries are to and from descendants of Rochester.

The Duncan Blanchard papers document Blanchards career as a research associate at the Woods Hole Oceanographic Institute and as a senior research associate at the State University of New York at Albany.

The Hooker Family Papers, 1790 to 1963 are arranged in five sections: correspondence, 1820 to 1930; financial and legal papers, 1790 to 1920; diaries and petty cash books, 1852 to 1926; miscellaneous papers, 1820 to 1963; and photograph albums, ca 1860's - 1890's. Sixteen of the twenty-seven boxes contain correspondence.