Among the Indians: Four Years on the Upper Missouri, 1858-1862Although the American Fur Company dominated the Upper Missouri fur trade during the middle decades of the nineteenth century, a number of small, independent firms (known as the Opposition) flourished briefly at this time. From 1858 until 1862, a young Philadelphian, Henry A. Boller, was one of the Opposition traders, serving first as clerk in Clark, Primeau and Company and then as a partner in Larpenteur, Smith and Company. His account of these years,