We made our eleventh camp on the north side of the Missouri, a few miles below the mouth of the Yellowstone. Here the Missouri is not very wide, and its sloping banks make a good place for crossing. A low bank of clean, hard sand lay along the water’s edge. We pitched our tents about noon on this sand. There were about a hundred tepees. They stood in rows, like houses, for there was not room on the sand to make a camping circle.