Correspondence, memoranda, diary fragment, scrapbooks, photos, clippings, and other papers relating to personal affairs, Arkansas and national politics, hydroelectric development, rural electrification, and the National Rural Electric Cooperative Association. Part of the materials pertain to Ellis' personal affairs, especially as regards his education, health, business and legal concerns, and his interest, 1940-41, in organizing the Arkansas Historical Association. Much of the material dating from 1943 to 1976 pertains to hydorelectric development and rural electrification in Vietnam, in South America, in the Soviet Union, and elsewhere, especially including the U.S.; to inland waters and flood control in the U.S., especially in Arkansas; to Ellis' work as Executive Manager of the NRECA; to Arkansas Power and Light Company and Electric Bond and Share Holding Company; to the proposed Arkansas Valley Authority; and to the U.S. Rural Electrification Administration, National Water Commission, and Tennessee Valley Authority. Other materials, dating mostly from 1933 to 1942, pertain to political affairs in the United States, especially in Arkansas and particularly in regard to: the Arkansas General Assembly; Congressional redistricting; Ellis' Congressional election campaigns of 1938, 1940, and 1942; the Democratic National Convention and the presidential election campaign of 1940. Included are newspaper clippings or constituent correspondence addressed to Congressman Ellis regarding the U.S. entry in war in 1941 and files of his constituent-addressed Washington Weekly Newsletter, 1938-1942. Correspondents include Homer Martin Adkins, Robert Sharon Allen, Carl Edward Bailey, Aben William Barkley, Hattie Wyatt Caraway, John Sherman Cooper, Dwight David Eisenhower, James William Fulbright, Fred Harvey Harrington, Oren Harris, Rupert Vance Hartke, Dallas Tabor Herndon, Hubert Horatio Humphrey, Robert Houghwout Jackson, Lyndon Baines Johnson, John Fitzgerald Kennedy, John Little McClellan, John William McCormack, John Elvis Miller, Edmund Sixtus Muskie, Andrew Russell Pearson, David Hampton Pryor, William Robert Poage, Sam Taliaferro Rayburn, Raymond Henry Rebsaman, David Yancey Thomas, Richard Ryan Thompson, Harry S. Truman,
