U.S. Census Catalog and Maps
    This site has maps of the U.S from 1790 to 1920 in the census years, showing  the progression
    of the states, with facts, showing which states had census for that year, and microfilm numbers.
    from the site click on Catalog then Census Microfilm, there you will find the maps  

These are links to maps of different areas where our Burnham Ancestors lived.

  ARKANSAS
    This site has maps of 1819, 1836, 1850 and present day. It is about a 3-minute download.

 Illinois
   This site has maps from 1790 to present day

Kentucky Map
This map has the county formation

North Carolina
This site has the North Carolina County Formation