I love maps. Really, maps are a fantastic research tool, and even more important when you are using census records. Think about it, why do you think that would be the case? I can think of several reasons; hopefully mine and yours match.
Map of the United States of America. Library of Congress. http://www.loc.gov/item/98685348/
Boundaries in the U.S. shifted, changed, and morphed over the years into what we know today. During western expansion, borders could be re-written almost overnight. Think a
