Using a string of far-flung military outposts as base camps for adventure, Catlin crisscrossed an untamed landscape, all-the-while painting a tremendous volume of Indian portraits and native scenes. The images were unlike anything the world had ever seen.
Read MoreToday we mark the death of Sitting Bill, the famed Sioux Indian chief and holy man best known for his victory over George Armstrong Custer's 7th Cavalry at the Battle of the Little Bighorn.
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