The papers of artist Isabella Howland measure 1.2 linear feet and date from 1899-1979. The collection documents her career through biographical material, correspondence, personal business records, writings, printed material, artwork, and photographs.

The Frank K. M. Rehn Galleries records measure 21.8 linear feet and are dated 1858-1969 (bulk 1919-1968). The records consist mainly of business correspondence with collectors, artists, museums and arts organizations, colleagues, and others. A small amount of Frank K. M. Rehns personal correspondence and a few stray personal papers of individual artists are interfiled. Also included are financial records, scrapbooks, printed matter, miscellaneous records, and photographs documenting most of the history of a highly regarded New York City art gallery devoted to American painting.

The papers of New York City art critic, writer, and lecturer Forbes Watson date from 1840-1967 with the bulk of materials dating from 1900-1960 and measure 13.92 linear feet. Found are biographical materials, correspondence, business records relating to the Arts Publishing Corporation, records documenting Watson's work for the Public Works of Art Project and the Section of Painting and Sculpture, reference files, an exhibition file from the Pepsi-Cola Company's Third Annual Exhibition, writings and notes, ten scrapbooks and loose pages, printed materials, and photographs.

The Library of Congress Copyright Deposit Collection is comprised of 2,335 photomechanical reproductions of works by 741 artists (mostly American). The large-format prints, deposited with the Library of Congress for copyright between 1890 and 1945, represent a broad range of nineteenth- and twentieth-century American art.

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 Walt Kuhn Family papers and Armory Show records measure 33 linear feet and date from 1859 to 1984, with the bulk of material dating from 1900 to 1949. Papers contain records of the legendary Armory Show of 1913, also known as the International Exhibition of Modern Art, which introduced modern European painting and sculpture to the American public. Papers also contain records of the Association of American Painters and Sculptors (AAPS), the artist-run organization that mounted the Armory Show; records of the New York artists' clubs the Kit Kat Club (founded 1881) and the Penguin Club (founded 1917); and the personal and family papers of New York artist Walt Kuhn (1877-1949), one of the primary organizers of the Armory Show. An unprocessed addition of 2.1 linear feet with material dating from 1894-1984 is comprised of personal and professional correspondence, assorted printed material, photographic material of Kuhn and his artwork, and several artifacts including a make-up box, clown cloak, and three copper printing plates of Kuhn's paintings.

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.

This collection contains over 37,000 35mm slides, 3,000 glass lantern slides and garden files that may include descriptive information, photocopied articles (from journals, newspapers, or books), planting lists, correspondence, brochures, landscape plans and drawings. Garden files were compiled by Garden Club of America (GCA) members for most of the gardens included in the collection. Some gardens have been photographed over the course of several decades; others only have images from a single point in time. In addition to images of American gardens, there are glass lantern slides of the New York Flower Show (1941-1951) and trips that GCA members took to other countries, including Mexico (1937), Italy, Spain, Japan (1935), France (1936), England (1929), and Scotland. A number of the slides are copies of historic images from outside repositories including horticultural and historical societies or from horticultural books and publications. The GCA made a concerted effort in the mid-1980s to acquire these images in order to increase its documentation of American garden history. Because of copyright considerations, use of these particular images may be restricted.