The Charles Henry Hart autograph collection dates from 1731-1917 and measures 1.71 linear feet comprised of 232 letters, portrait prints, and other documents signed by American artists. There is a .01 linear foot (6 items) unprocessed addition to this collection donated in 2021 that includes a letter from Winslow Homer to Mr. Clarke, November 28, 1892; typed and annotated lists of autographs of artists in the collections of Charles Henry Hart; handwritten note about English painter and engraver, John Keyse Sherwin, undated; handwritten note regarding Gennearino Persico, miniature artist, July 18, 1826.

Correspondence; sketchbooks, 1 scrapbook; photographs; drawings; glass negatives; and printing plates.

Correspondence of the Century Magazine and its predecessors, Scribner's Monthly, and St. Nicholas Magazine. Also included is material related to the Century War Series.

The Richard Murray research material regarding mural painting in the United States measures 20.5 linear feet and dates from 1896 to 2006 with the bulk of the material dating from 1970 to 2006. The collection is comprised of Murray's extensive research files, scattered writings, and photographic materials for his life-long research on mural painting in the United States.

The papers of art historican August Jaccaci measure 7.2 linear feet and date from 1889 to 1935, with the bulk of the material dating from 1904 to 1914. The collection documents Jaccaci's work as an art historian, writer, and editor, primarily during the period he researched, compiled, and published his book Noteworthy Paintings in Private American Collections. More than one-half of the collection consists of extensive correspondence to and from many notable artists, collectors, and art historians, including John La Farge, Kenyon Cox, Isabella Stewart Gardner, and Bernard Sickert concerning the research and publication of the book. The papers also house legal files, writings and notes, art collection research files, and photographs of artwork.

The papers of wood engraver Timothy Cole date from 1883-1936, and measure 0.5 linear feet. Found within the papers are letters primarily written by Timothy Cole to the editors of Century Magazine, and letters to Cole from colleagues Gifford Beal, Alice Brown, George de Forest Brush, Kenyon Cox, David Finney, Helen C. Frick, Joseph Pennell, Caroline Powell, John Singer Sargent, and Helen M. Turner. Also found are miscellaneous writings, artwork including wood engravings and printing plates, miscellaneous clippings and a photograph of Cole and his wife.

The Thomas Prichard Rossiter and Rossiter Family papers measure 0.5 linear feet and date from 1840 to 1961. Included are letters to painter Thomas Prichard Rossiter and letters to his son, architect Ehrick Kensett Rossiter, documenting their friendships with many artists and Thomas Prichard Rossiter's sketchbook and loose sketches. Edith Rossiter Bevan's papers include her writings on her grandfather, Thomas Prichard Rossiter; a scrapbook; photographs of the Rossiter family; notes by Bevan; news clippings; and other printed material. Also found is Bevan's collection of artists' letters.

Biographical forms completed by artists and illustrators for the Art League Publishing Company's ARTISTS YEAR BOOK. Each contains details written by the artist concerning parentage, exhibitions and collections containing his work, books illustrated, memberships in clubs, etc.

Correspondence, printed material, writings, and other personal papers collected by Carl Zigrosser and Leila Mechlin and later added to by others, all relating to American art.

The papers of Boston painter, teacher, critic, and writer Philip Leslie Hale measure 7.4 linear feet and date from 1818 to 1962, with the bulk of the material dating from 1877 to 1939. Biographical information; correspondence with family, friends, and colleagues, including many artists; sketches and 9 sketchbooks; writings; printed material; and photographs document the artist's career and personal life. The collection also includes research materials and catalogs compiled by Albert J. Kennedy for a never-published Philip Leslie Hale memorial volume.