Surveys--Pennsylvania--19th century 4 Land surveys--Pennsylvania--19th century 2 Coal Industry--Pennsylvania--19th century 1 Land surveys--Pennsylvania--18th century 1 Lumber trade--Pennsylvania--19th century 1 New Jersey--Surveys 1 New York--Surveys 1 more ... Pennsylvania--Politics and government--17th century 1 Pennsylvania--Politics and government--18th century 1 Pennsylvania--Politics and government--19th century 1 Pennsylvania--Surveys 1 Roads--Pennsylvania--18th and 19th centuries 1 Surveys--Delaware 1 Turnpikes--Pennsylvania--19th century 1 less ...