Looking for More Info on Robert Timothy Walls Born 1821

I am searching for more info on my great great great grandfather Robert Timothy Walls born in cooper missouri on 1821.married Nancy Jane Robertson in Bates missouri,,,trying to find out when they died and where as well as his parents and if he was part native american ...and of what tribe if so..was told that the walls family on this side were..anything i get would be of big help..