Contains holograph manuscripts, typescripts, typesetting copies, and galley proofs of some books of Burt (Princeton Class of 1936), such as Leopards in the Garden (Boston: Little Brown, 1968), Palaces for the People (Boston: Little Brown, 1977), which is about art museums in the United States, The Perennial Philadelphians (Boston: Little Brown, 1963), and Scotland's Burning (Boston: Little Brown, 1953), as well as short stories, poems, and musical compositions. The collection includes correspondence between Burt and family members Struthers Burt, Katharine Newlin Burt, and Julia Burt Attebury, and with friends, publishers, and organizations. Also present are papers concerning the history and finances of the Burt family property at Three Rivers Ranch, Wyoming, which is now part of the Grand Teton National Park. Approximately 100 19th and 20th century photographs are present, including albumen and tintype prints of people, family members, and places such as family estates and Three Rivers Ranch.