When the explorers Lewis and Clark asked the Shoshone woman Sacagawea and her husband, French trapper Toussaint Charbonneau, to be interpreters on their expedition, the couple brought their two-month-old son Jean Baptiste along. But the rest of Jean Baptiste Charbonneau's story has been largely untold--until now. Educated in St. Louis by Captain Clark, Jean Baptiste went on to live in a royal palace in Europe and to speak many languages. But, truly his parents' son, he returned to the American West, living out his life as a trapper, scout, and explorer.