I can help with that. Go to askthelibrarian. I learned this from one of the Ancestry webinars. It's free and you can go three requests per year. They mailed me about 6 different maps of the towns I was looking for from 1700s to present day with some reference material as well. It really helped. I was lost too.
Geography and Map Division
Library of Congress
101 Independence Ave., SE
Washington, D.C. 20540-4650
telephone: 202-707-6277
fax: 202-707-8531
URL:
http://www.loc.gov/rr/geogmap/ email:
http://www.loc.gov/rr/askalib/ask-geogmap.html