Letters written to Gay from political and literary contemporaries such as Horace Greeley, Charles Sumner, and William Bryant; reports in letter form from his reporters at the front during the Civil War; and personal correspondence including many letters from his wife, Elizabeth Neall Gay. Letters written to Mrs. Gay from family friends and business associates including many from her husband. Correspondence of other members of the Gay family including Walter Gay, Sarah Gay, and Allan Gay. Diaries, notebooks, and journals of Sydney Howard Gay.

The records of personal papers of Anna Maria Talbert and family between 1881 and 1938, and legal documents of the inheritance issues between 1872 and 1927.

University Properties records, 1909-1966, consists of materials concerning buildings and real estate sold and acquired by the University at Buffalo (formerly the University of Buffalo).

Five manuscripts, one map, and four books formerly belonging to various members of the Van Cortlandt family: New York (Colony) Laws, Statutes, etc. Lawes Establish'd by the Authority of his Majesties Letters Patents.. By virtue of a Commission from.. James Duke of Yorke.. 1664. This first set of laws for New York, commonly known as the "Duke's Laws" were promulgated by Governor Richard Nicolls, after a meeting with representatives in Hempstead, Long Island, on March 1, 1664. Bound with this code are nine additions most of which are "Orders made at the Generall Court of Assizes held in New York" 1664-1672. The texts are written in several different hands and signed variously by Richard Nicolls (1624-1672), first governor of New York, 1664-1668; Matthias Nicolls (1630?-1687), Richard's brother and secretary to the province during the period covered; and Francis Lovelace (1618?-1675?), brother of the poet Richard Lovelace and governor of New York, 1668-1673. Written copies of this code were prepared for all the towns on Long Island. Of these copies only four are apparently extant, including this one and one in the New York Historical Society.

A small but interesting collection of family documents that relate to the history of slavery and Columbia.

Correspondence, manuscripts, documents, photographs, memorabilia and printed materials of John Mitchel, John Purroy Mitchel, and other members of the Mitchel and Purroy families. The collection concerns Irish nationalism, family matters, Purroy family business interests in Central America, the John Purroy Mitchel Memorial and William Brown Meloney's files relating to his research and writing of "The Story of John Purroy Mitchel" along with the manuscript and typescript drafts for this unpublished biography.

Correspondence, manuscripts, typescripts, contracts, legal briefs, patents, and other documents, music scores, cartoons, technical drawings, account books, blueprints, photographs, clippings, printed legal briefs & transcripts, proofs, scrapbooks, and other printed materials of William M. Speer.

The records of W.R. Grace & Co. cover the rise of the Grace shipping business from 1864 until World War II. The early correspondence concerns all aspects of the shipping business in New York and South America, mining interests in Peru and Chile, the railroad in Costa Rica, the inter-ocean canal planned for Nicaragua, and political interests throughout Central and South America. There are letter books, correspondence, and scrapbooks of clippings for all aspects of W.R. Grace's career. There are minute books and other documents for more than 50 subsidiary companies owned by W.R. Grace & Co. or by family members. The papers of Joseph Peter Grace (1872-1950) continue the business, family, and philanthropic activities until 1942. There are also 20 reels of motion picture film about the Grace Co. South American interests in the 1950s.