Born in Dagsboro, Delaware, 1796. Graduate of Yale College 1815. Member of Delaware House of Representatives 1824. Secretary of State of Delaware 1826-1828. United States Senator 1829-1836, 1845-1849 and 1853 until his death, 1856. Chief Justice of Delaware 1837-1839. United States Secretary of State under Presidents Taylor and Fillmore, 1849 to July 9, 1850. Negotiated the Clayton-Bulwer Treaty with Great Britain.