The Albert Duveen collection of artists' letters and ephemera measures 1.1 linear feet and dates from 1807 to 1946. Unrelated letters written by over 170 mostly 19th and early 20th century American artists are found in this compiled collection of art critic, dealer, and collector Albert Duveen. Additional ephemera includes printed material and photographs of artwork.

The scattered papers of painter Martin Johnson Heade measure 0.4 linear feet and date from 1853 to 1904. The bulk of the collection consists of letters from his friend and fellow artist, Frederic Edwin Church between 1866-1899. Within the papers is an annotated sketchbook, circa 1853-1877, and a detailed handwritten notebook about hummingbirds dating from circa 1864 and circa 1881. Also found are a few letters and notes from others, deeds, and an 1865 exhibition catalog.

The Charles Henry Hart autograph collection dates from 1731-1917 and measures 1.7 linear feet comprised of 226 letters, portrait prints, and other documents signed by American artists.

The papers of Hudson River School painter Jervis McEntee measure 1.6 linear feet and date from 1796 and 1848 to 1905. Letters from close friends and family members to McEntee include many from his mentor Frederic Edwin Church, and fellow artists Samuel Putnam Avery, George Henry Boughton, Sanford Gifford, Richard Henry, Eastman Johnson, Elizabeth B. Stoddard, John Ferguson Weir, Worthington Whittredge, and others. Papers relating to the McEntee family include obituaries, a family genealogy, and letters from and regarding family members. There are also papers relating to the Vaux family (McEntee's brother-in-law's family) and American architect and landscape artist Calvert Vaux, who designed a studio for McEntee. Of special significance are five volumes of diaries dating from 1872 through 1890 which provide a detailed depiction of the American art world in the 1870s and 1880s.

The collection of artists' letters compiled by Mary and John McGuigan Jr. measure 0.6 linear feet and date from 1794-1938. The collection is comprised of a group of letters, writings, and signed documents to and from a variety of artists, art administrators, art critics, historians, and art-related organizations assembled from multiple sources. It also includes associated printed material with some documents and a few photographs, including carte de visites and cabinet cards.

The papers of arts administrator, museum director, collector, dealer, and editor Charles M. Kurtz (1855-1909), measure 27.74 linear feet and date from 1843-1990 (bulk dates 1884-1909). The bulk of the collection consists of detailed chronological correspondence between Kurtz and his wife and family, friends, colleagues, and business associates that documents many notable exhibitions, galleries, museums, private collections, as well as cities, people, and events of the period. Also found in the collection are Kurtz's diaries, scrapbooks, printed materials, and photographs.

The personal papers of Charles Lang Freer, the industrialist and art collector who founded the Freer Gallery of Art. The papers include correspondence, diaries, art inventories, scrapbooks of clippings on James McNeil Whistler and other press clippings, and photographs.

The Thomas Warren Sears Photograph Collection documents examples of the design work of Thomas Warren Sears (1880-1966), a landscape architect and amateur photographer from Brookline, Massachusetts. Sears, who was based for most of his career in Philadelphia, designed a variety of different types of landscapes ranging from private residences, schools, and playgrounds to parks, cemeteries, and urban housing developments located primarily in Pennsylvania, Maryland, and New York. In addition to some of Sears' design work, images in the collection document Sears' domestic and foreign travels, design inspirations, and family. The collection includes over 4,800 black and white negatives and glass lantern slides dated circa 1899 to 1930. While most images show private and public gardens, there are a significant number of unidentified views and views photographed in Europe during two trips he took there in 1906 and 1908. Few images are captioned or dated. In addition, there are over 50 plans and drawings, most notably for Balmuckety in Pikesville, Maryland and Reynolda in Winston-Salem, North Carolina, and 3 monographs by or about Sears.

The records of the New York City gallery James Graham & Sons measure 103.2 linear feet and date from 1815, 1821, circa 1896-2011 (bulk 1950s-1980s). The collection generally documents the gallery's contemporary art department during the time in which Robert Claverhouse Graham, Sr. worked at the gallery (1940-1979); records prior to 1954 are sparse and scattered. Gallery records include artist files; correspondence; exhibition files; financial records; inventory records; printed materials; sales, loans, and consignment records; scrapbooks; and photographic materials. Also found are records from Coe Kerr Gallery regarding exhibitions.

This collection contains a variety of materials documenting the lives and careers of scientists from a wide range of fields, including mammalogy, ornithology, ichthyology, herpetology, botany, entomology, paleontology and geology. Also included are files on conservationists, taxidermists, historical figures, explorers, frontiersmen, and hunter...