Includes incoming and outgoing personal and business-related correspondence. Correspondents include the elder William Cyrus Howard (typically signed as "Cyrus Howard"), the younger William Cyrus Howard (went by "Billie" amongst some family and friends), other Howard family members, various King family members, real estate agents, bankers, lawyers, farm managers in Kansas, politicians, and others. Includes letters to and from William Cyrus Howard, his future wife Lizzie, and his parents during the Civil War. The correspondence does not appear to be a complete run, and many letters are in very poor condition. Some additional personal and business correspondence can be found in the addition located at RH MS 892.