The Ellen Starr Brinton papers consist of personal correspondence (1935-1953), travel journals and address books, as well as notes, manuscripts and typescripts of articles and related correspondence and subject files (1895-1980). Part of her correspondence focuses on Cuban-American relations (1935-1937). Other correspondence includes letters to and from Rosa Kulka, who was Chairman of the Women's International League for Peace and Freedom (German Group) of the Czechoslovakian branch in Brunn from 1924 to 1938. Kulka and her family were Jewish pacifists who tried unsuccessfully to come to the United States to escape persecution in Czechoslovakia. The correspondence includes Brinton's attempts to locate Kulka and her family after the war.
Topics of Brinton's research include the Daughters of the American Revolution, Elihu Burritt, Benjamin West's painting "Penn's Peace Treaty With the Indians," the Universal Peace Union, and Mexican-American relations; there is a card file of notes for a proposed biography of Jane Addams. Her notes and manuscripts for articles and books, and the manuscript draft ("Dreamer of Dreams") of her unpublished work on the American peace movement are also located in this collection.
Correspondents include Emily Greene Balch, Heloise Brainerd, Benny Cederfeld, A. Ruth Fry, Rosa Kulka, Paul Vanorden Shaw, Phyllis M. Tiller, Herminio Portell Vila, Elizabeth A. Wheeler, and Lyra Trueblood Wolkins, who contributed reminiscences about her father, Benjamin Trueblood.