American President, born in Virginia, of Scottish descent; left college to join Washington's army; was wounded in the war, and studying law, entered Congress in 1783; he assisted in framing the Constitution, and sat in the Senate 1790-1794; his diplomatic career in France was marked by the purchase of Louisiana from that country in 1803; he was governor of Virginia thrice over, and Secretary of State till 1817; then followed two terms of the Presidency, during which Florida was acquired from Spain 1819, the delimitation of the slave limit by the Missouri compromise, the recognition of the South American Republics, and the statement of the "Monroe doctrine"; in his later years his generosity led him into debt, and he spent his closing days with relations in New York (1758-1831).