The records of the New York City based Valentine Gallery measure 1.8 linear feet and date from circa 1890 to 1960. The bulk of the material documents the gallery's dealings with artists Louis Eilshemius, John Kane, Henri Matisse, and C.S. Price. Additionally, there is one scrapbook which contains printed materials regarding Valentine Gallery exhibitions from 1925-1936.

The papers of abstract painter Milton Avery measure 2.8 linear feet and date from 1926 to 1982, with the bulk of the collection dating from 1950 to 1982. Almost the entire collection consists of records of the Milton Avery Trust (2.4 linear feet) maintained by Avery's wife Sally, who served as a trustee. Milton Avery's business and personal correspondence (five folders) contains letters from friends and fellow artists, including a few from George Duthuit, Louis Eilshemius, Marsden Hartley, Wallace Putnam, and Mark Rothko. Also found are scattered writings about Avery, price lists, estate records, exhibition announcements and catalogs, and news clippings.

The papers of Boston area painters Esther Baldwin Williams and daughter Esther Williams measure 2.1 linear feet and date from 1887 to 1984. The scattered papers of both women include biographical information, personal business records, correspondence, writings and notes, two diaries, four sketchbooks, printed materials, photographs, and one photograph album.

The papers of painter De Hirsh Margules measure 5.5 linear feet and date from 1888-2001, with the bulk dating from 1923-1965. The papers contain biographical material, and business and personal correspondence, including letters from Alfred Stiegliz, John Marin, Henry Miller, Max Schnitzler, Charles J. Connick, Louis M. Eilshemius, Alex King, and Myron Lechay. Also found are writings, printed material, scrapbooks, photographs, works of art and audio recordings documenting Margules' personal life and professional career.

The records of the Richard York Gallery, a New York gallery specializing in American art from early 1800s to 1950, measure 79.3 linear feet and date from circa 1865-2005, with the bulk of the material dating from 1981 to 2004. Three-fourths of the records are artists' artwork files, documenting the sale and consignment of nearly 6,500 works of art. The gallery's activities are also recorded through correspondence, client files, gallery invoices, inventories, business and financial records, printed materials, scrapbooks, photographic materials of artwork, and estate records for the John Marin estate and Sergio Stella estate (Joseph Stella). An addition of 10.2 linear feet, dated circa 1865 to 2005, includes artists' files arranged alphabetically containing printed material, clippings, exhibition announcements, and scattered correspondence and financial documents.

The records of the American Federation of Arts (AFA) provide researchers with a complete set of documentation focusing on the founding and history of the organization from its inception through the 1960s. The collection measures 79.8 linear feet, and dates from 1895 through 1993, although the bulk of the material falls between 1909 and 1969. Valuable for its coverage of twentieth-century American art history, the collection also provides researchers with fairly comprehensive documentation of the many exhibitions and programs supported and implemented by the AFA to promote and study contemporary American art, both nationally and abroad.

The papers of art historian E. P. Richardson measure 28.7 linear feet and date from 1814-1996, with the bulk of the materials dating from 1921-1996. Within the papers are scattered biographical materials; acquisition files for Richardson's personal art collection; professional and personal correspondence with colleagues, art historians and critics, artists, museums, galleries, and dealers; numerous writings, including manuscripts and research files for his published books, articles, and lectures; general research notebooks and files compiled by Richardson on a wide variety of art-related topics and artists; professional and committee files; as well as a smaller amount of Constance C. Richardson's papers.

The records of the Downtown Gallery date from 1824 to 1974 (bulk 1926-1969) and measure 109.56 linear feet. The records present a comprehensive portrait of a significant commercial gallery that operated as a successful business for more than forty years, representing major contemporary American artists and engendering appreciation for early American folk art. There is an unprocessed addition to this collection dating circa 1970 of a single financial/legal document.

The Walter Rosenblum Collection is comprised of 7,396 silver gelatin negatives taken by noted photographer Walter Rosenblum (1919-2006) for New York art galleries, collectors and artists between 1945 and 1976. The collection reflects the art of his time and is particularly strong in American and European avant-garde, surreal and abstract works.

The Victor D. Spark papers measure 22.2 linear feet and date from circa 1830 to 1983, with the bulk of the material from 1930 to 1970. The papers document Spark's career as a New York City art dealer and appraiser who was most active from World War II through the 1970s, focusing on Old Masters paintings and 19th and early 20th century American art. Found within the papers are biographical materials, artist files, client files, financial records, legal records, printed material, and photographs.