What happened to William clark?

After the expedition, Clark would serve as governor of the Missouri Territory and he continued to lead Native American affairs for 30 years. He enjoyed a high reputation as an authority on the West and many hunters, adventurers and explorers often visited him in St. Louis for advice. He died at age 69 on September 1, 1838, of an unknown illness while at the home of his son, Meriwhether Lewis Clark.