Sacagawea, kidnapped as an adolescent and sold as a slave to a French-Canadian fur trader, is best known for her role as interpreter and symbol of goodwill for Lewis and Clark on their journey west. Despite her pivotal role in this era of Manifest Destiny and blending cultures, much of her ensuing life story remains uncertain, thanks to a larger focus on Lewis and Clark themselves, as well as the perpetuation of legend over fact in several 20th...