Sacagawea's son, Jean Baptiste, had become a toddler over the course of the expedition, and Clark had formed an attachment with him. It’s likely that Sacagawea and her family moved to St. Louis, Missouri. Clark invited the family there, and Jean Baptiste lived there, too. Clark paid for him to attend St. Louis Academy, and he graduated in 1823. He died in 1866, a year after the end of the Civil War.