MITCHELL, Robert B., lawyer, born in Rich-land county, Ohio, 4 April, 1823 ; died in Washington, D. C., 26 January, 1882. He was educated at Washington college, Pennsylvania, and then studied law. During the Mexican war he served in the Ohio volunteers as 1st lieutenant, and oil its conclusion he resumed the practice of his profession. In 1856 he moved to Kansas, and took an active part with the free-state men in their struggle with the pro-slavery party. He was a member of the territorial legislature in 1857-'8, and treasurer in 1858-'61. At the beginning of the civil war he was made colonel of the 2d Kansas volunteers, and was severely wounded at the battle of Wilson's Creek. On his recovery he raised a regiment of cavalry, and was commissioned brigadier-general of volunteers on 8 April, 1862. He was given command of the 13th division of General Don Carlos Buell's army, and participated in the battle of Perryville. During 1865-'7 he was governor of New Mexico, and, after completing his term of office, settled in Washington, D. C., where he remained until his death.