The papers of New York sculptor Robert White measure 8.4 linear feet and 0.846 GB and date from 1889-2003, with the bulk of the material from 1915-2003. The collection documents White's varied career as a sculptor, educator, painter, and illustrator through biographical material; extensive correspondence; project files; personal business records; notes and writings; sketchbooks and sketches by Robert White and others; printed and digital material; audiovisual material; artifacts; and photographs.

The records of Midtown Galleries measure 86.82 linear feet and date from 1904 to 1997. The collection documents the operation and general administration of the business and includes artist records, exhibition material, inventories, financial records, photographs, and printed material.

The records of New York City Kraushaar Galleries measure 91.9 linear feet and date from 1877 to 2006. Three-fourths of the collection documents the gallery's handling of contemporary American paintings, drawings, and sculpture through correspondence with artists, private collectors, museums, galleries, and other art institutions, interspersed with scattered exhibition catalogs and other materials. Also included are John F. Kraushaar's estate records; artists' files; financial ledgers documenting sales and gallery transactions; consignment and loan records; photographs of artwork; sketchbooks and drawings by James Penney, Louis Bouché, and others; and two scrapbooks.

The Leo Castelli Gallery records measure 215.9 linear feet and 0.001 GB and date from circa 1880-2000, with the bulk of the materials dating from the gallery's founding in 1957 through Leo Castelli's death in 1999. The major influence of dealer Leo Castelli and his gallery on the development of mid-to-late twentieth century modern art in America is well-documented through business and scattered personal correspondence, administrative files, exhibition files, extensive artists' files and printed materials, posters, awards and recognitions, photographs, and sound and video recordings. Also included are records for the subsidiary firms of Castelli Graphics and Castelli/Sonnabend Tapes and Films.

The papers of New York artist Lillian Kiesler and architect and sculptor Frederick Kiesler measure 49.1 linear feet and 0.001 GB and date from circa 1910s-2003, with the bulk of the material from 1958-2000. The collection documents their personal and professional lives and the legacy of Frederick Kiesler's work through biographical material, correspondence, legal, financial and business records, teaching files, exhibition and performance files, artwork, subject files, printed and digital material, writings and interviews, monographs, photographic material, and sound and video recordings. Also found are papers related to Abstract Expressionist painter Hans Hofmann and the papers of artist Alice Hodges.

The papers of painter, writer, and dancer George Deem measure 18.2 linear feet and 10.71 GB and date from 1904-2015, with the bulk of the material dating from 1960-2008. The collection documents Deem's path from Midwestern farm child to New York City artist and teacher who specialized in recreating works of great masters, especially Johannes Vermeer. Correspondence, exhibition files, subject files, project files, writings by and about Deem, printed and digital material and photographic materials all show the trajectory of Deem's development as an artist.

The Betty Parsons Gallery records and personal papers measure 57.2 linear feet and date from 1920 to 1991, with the bulk of the material dating from 1946-1983. Records provide extensive documentation of the gallery's operations from its inception in 1946 to its closing in 1983 and of the activities of Betty Parsons as one the leading art dealers of contemporary American Art in the latter half of the twentieth century, particularly the work of the Abstract Expressionists. Over one third of the of the collection is comprised of artists files containing correspondence, price lists, and printed materials. Additional correspondence is with galleries, dealers, art institutions, private collectors, and the media. Also found are exhibition files, exhibition catalogs and announcements, sales records, stock inventories, personal financial records, and photographs. Betty Parsons' personal papers consist of early curatorial files, pocket diaries, personal correspondence, and evidence of her own artwork, including sketchbooks, and files documenting her personal art collection.

The records of the Perls Galleries measure 79.6 linear feet and date from 1937 to 1997. Founded by Klaus Perls in 1937 and operating until 1997, the gallery dealt primarily in modern French art and the artwork of Alexander Calder. Found within the records are extensive correspondence (circa 44 linear feet) with artists, dealers, galleries, museums, and collectors; photographs and negatives of inventory and other artwork; exhibition files, scattered financial records; and exhibition catalogs and clippings.

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.

These records document the governance and programmatic activities of the Museum of the American Indian/Heye Foundation (MAI) from its inception in 1904 until its sublimation by the Smithsonian Institution in 1990. The types of materials present in this collection include personal and institutional correspondence, individual subject files, minutes and annual reports, financial ledgers, legal records, expedition field notes, research notes, catalog and object lists, publications, clippings, flyers, maps, photographs, negatives and audio-visual materials. These materials span a varied range of subjects relating to the activities of the museum which are more fully described on the series level.