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(1809-1890), represented Ohio in the U.S. Congress as a Whig from 1843 to 1851. He was Minister to Brazil from 1851 to 1853, negotiating important commercial treaties. He commanded a brigade at Bull Run, and served under General Rosecrans in the Shenandoah Valley. He led a division at Cross Keys and was engaged in the second battle of Bull Run. He again served in the U.S. Congress as a Republican from 1863 to 1871. He served on the Joint High Commission which negotiated the Treaty of Washington, and was Minister to England from 1871 to 1876.