The Henry Ware Eliot Papers consist of military certificates, forms, and correspondence, exhibition and service programs, and documents regarding Eliot's business and personal involvements. The Correspondence Series contains letters ranging in date from 1868 to 1953. There are letters regarding the military involvement of both Eliot and his two sons, Henry and T.S. Other letters concern family exchanges, holiday greetings, and the donation of the collection to the Missouri Historical Society. This series includes correspondence about T.S. Eliot and letters signed by him, including a Christmas card to his parents written at age seven. The Military Documents Series consists of certificates and official forms dating from 1862 to 1864. The Civil War–era documents concern Eliot's oath of allegiance, exemption from service, and honorable discharge. The Miscellany Series, ranging in date from circa 1860 to 1929, includes: Washington University programs, an invitation to a Missouri Botanical Garden banquet, Smith Academy programs, a dedication of the new home of the Mission Free School, a church service program, a report on the Soldier's Orphan Home, documents regarding Eliot's lot at Bellefontaine Cemetery, a subscription to the department of Mining and Metallurgy, guest tickets to the Republican National Convention, documents regarding legislation to regulate the treatment and control of neglected and delinquent children, tickets to the Louisiana Purchase Exposition of 1904, a note about William Greenleaf Eliot's slave, unidentified photographs, and various writings of Charlotte C. Eliot.