Correspondence, diaries (1924-1962), speeches, writings, subject files, financial records, family papers, scrapbooks, and other papers relating to Furman's career as an author and journalist and to her personal life and family. Documents her work for Omaha Bee-News, Associated Press, and New York Times; with the U.S. Dept. of Health, Education, and Welfare; and with Furman Features in collaboration with her sister, Lucile N. Furman, writing for organizations such as the American Association of University Women, Democratic National Committee (U.S.) Women's Division, League of Women Voters, and National Children's Bureau. Also documents her research and writings on such topics as education; health; the political and social history of Washington, D.C.; the White House; and women in public life. Includes early papers of the Winslow family of New Hampshire and papers of Furman family members including her husband, Robert Burns Armstrong, and her sister, Lucile N. Furman.

Correspondents include Bess Streeter Aldrich, Ella F. Auerbach, Elisabeth Randolph Shirley Enochs, Edith Benham Helm, Genevieve Forbes Herrick, Frances Parkinson Keyes, Murtle Mason, Dorothy McAllister, Mary Margaret McBride, Iantha McCloskey, Anthony Netboy, Herbert H. Rogers, Mae Rogers, Ruth Bryan Owen, Eleanor Roosevelt, Malvina Thompson, and Bess Wallace Truman.