You shouldn't have any trouble finding the maps you need. Many maps from the Revolutionary War era (including the Sauthier 1779 map of new York) are available from the American Memory site at the Library of Congress. http://lcweb2.loc.gov/ammem/gmdhtml/gmdhome.html. You should also check the David Rumsey site at www.davidrumsey.com. Among other things you can find there Christopher Colles' Survey of the Roads (1790), which is more detailed and accurate than the British maps of the colonial era. David Allen Map Librarian SUNY Stony Brook