What happened to Clark after the Lewis and Clark expedition?

In January of 1808, 38 year old Clark married 16 year old Julia Hancock, with whom he had five children. St. Louis became his home, and there he held several political offices at the same time and was involved in the fur trade and real estate. In 1813, he was appointed the first governor of the newly created Missouri Territory, and was reappointed three times, until Missouri achieved statehood in 1821. Julia Hancock Clark died in 1821, and soon afterward Clark married Harriet Kennerly Radford, a widow who was also a cousin of his first wife. His most important post-expedition service was in his long tenure as Superintendent of Indian Affairs for the West. He died on September 1, 1838 at the age of 69 after a brief illness, in the home of his son Meriwether Lewis Clark on Broadway in St. Louis. Today, a plaque within the building at 200 North Broadway marks the location of Clark's death. After a grand funeral procession which stretched over a mile along the streets of St. Louis, Clark was buried with Masonic and military honors outside the city, on the farm of his nephew, Col. John O'Fallon. In the 1850s his body was moved to the new Bellefontaine Cemetery, a landscaped rural cemetery on the north side of the city of St. Louis, Missouri.