Question if either of you have any info/observations.
Looking at a map of Red River along the Texas/Oklahoma border it seems to me the
map shows the state boundary varying to both sides of the Red River.
example:
Take the following map and explode it until you get a close up of the Tx/Ok, Red River
area and look at the supposed state boundary.
http://digital.library.okstate.edu/Chronicles/v002/v002p298.html
“...Red River is an extraordinarily crooked stream with many sharp bends, turns and convoltions; so that the length of the river bounding Oklahoma is 539 miles where in a direct line the distance is but 321 miles. It developed that in times of floods, by the action known as avulsion the river would cut across a bend and make a new channel, and a tract of land formerly north of the river and therefore in Oklahoma would thereafter be south of the river, and vice versa.
The [Supreme] court decided that where intervening changes in the bank have occurred through the natural and gradual processes known as erosion and accretion, the boundary has followed the change; but where the stream left its former channel and made for itself a new one by avulsion, the boundary has not followed the change but has remained on and along what was the south bank before the change occurred. “
Sure does make for a messy border.