William Clark: (1770-1838) William Clark was the elder of the two men - a rugged man and an extrovert, full of life and human understanding. He was the one who could make contacts with the Indians through whose lands they travelled. It was Clark who found Sacajawea. In 1804, Clark was made a second lieutenant of the Army, rose to a first lieutenant, and resigned to become Brigadier General of the Louisiana Militia and Indian Agent for Upper Louisiana. He served as governor of the territory of Missouri from 1813 to 1820 and from 1822 until his death in 1838. He was Superintendent of Indian Affairs, with headquarters in St. Louis. Clark was a man of heroic material, physical and moral stature, who commanded the respect of all who came into contact with him.