Historian, George Catlin Places the Mandan Sioux at the Serpent Mound in Ohio in Ancient Times
The Dakota Sioux not only built mounds for their dead, but also constructed Serpent Mounds in Ohio, Illinois, Wisconsin and Minnesota.
“Prehistoric
America,” Vol. II. Stephen Peet, 1892
“It is well known
that Catlin, the celebrated painter maintained that the Mandan’s,
who were a branch of the Dakotas, originally were located in Ohio,
the very region in which the great serpent is found, but that they
migrated from that region, passing down the Ohio River, and up the
Missouri, and that they became nearly extinct by the time they
reached the headwaters of the Missouri. I think there may
be a pretty fair deduction drawn, that they formerly occupied the
lower part of the Missouri, and even the Ohio and Muskinghum, and
have gradually made their way up the Missouri to where they are now.”