" Turning to the great Dakota or Sioux stock, we run against one of the most naïve of the sentimentalists, Catlin, who perpetrated several books on the Indians and made many "fearless" assertions about the red men in general and the Mandans in particular.

There are persons who hold that the descendants of his followers built the mounds in the Mississippi Valley, and that some of them became the white Mandans of the upper Missouri, and that others founded this old Mexican civilization.