I got the following address from the Ancestry Daily News. It is an animated map showing the formation of the counties of TN. There is also a link to a map of the US. If your family is like mine (especially my Murphys and Vises) it is hard to keep up with them, not because of their moving, but the county line moving. It just gives another avenue to search in case you cannot find them on consecutive census in the same county. Hope this helps. http://www.segenealogy.com