Dakota again

I've ordered a copy of: Anderson, Gary Clayton. 1997. Kinsmen of Another Kind: Dakota-White Relations in the Upper Mississippi Valley, 1650-1862, Minneapolis: Minnesota Historical Society Press. I think this is going to answer a lot of my questions. (It seems to include some interesting stuff on the historical idea of the Mississippi as a natural boundary between settlers and Native Americans - and, of course, on the death of that idea.)