President John Adams appointed Winthrop Sargent as the first governor of the Mississippi Territory, effective from May 1798 to May 1801. William C. C. Claiborne (1775–1817), a lawyer and former Democratic-Republican Congressman from Tennessee (1797–1801), was governor and superintendent of Indian affairs in the Mississippi Territory from 1801 through 1803. Although he favored acquiring some land from the Choctaw and Chickasaw, Claiborne was generally sympathetic and conciliatory toward the Indians. He worked long and patiently to iron out differences that arose, and to improve the material well-being of the Indians. He was also partly successful in promoting the establishment of law and order, as when his offering of a two thousand dollar reward helped destroy a gang of outlaws headed by Samuel Mason (1750–1803). His position on issues indicated a national rather than regional outlook, though he did not ignore his constituents. Claiborne expressed the philosophy of the Republican Party and helped that party defeat the Federalists. When a smallpox epidemic broke out in the Spring of 1802, Claiborne's actions resulted in the first recorded mass vaccination in the territory and saved Natchez from the disease.