Contains photocopied art and sketchbooks, and notes and other ephemera relating to the work of Mahonri Mackintosh Young for various purposes in various places. Materials date from 1870 to 1956.

Correspondence, sketchbooks, research files, autobiographical files, scrapbooks, and news clippings. Also includes diaries, address and memorandum books, and financial records. Most letters were exchanged with family members and close friends. Primary correspondents included his son, Mahonri Sharp Young; his first wife, Cecilia Sharp Young; and Mary Lightfoot Tarleton, whom he met in Paris after Cecilia died in 1917. Research files include extensive information on other artists.