Your email address appeared and, beneath it, a list of all your postings to GenForums. It's a useful feature. Dunklin Co. MO shortly after the 1900 census. Since you tracked the family already, I won't go into that any further. If we added all the bull from your grandfather to all the bull from my father, we'd have a good-sized herd.
People are usually proud of their Indian ancestry and often overstate it.
I would guess they left in 1899 or early 1900, since even the adult children are still living in the household. It would be interesting to find them in the 1880 TN census. You said you had quite a bit on Belle. I'd be grateful if you would post what you have. It's as if they had dropped off the face of the earth.