Land surveys 12 Land Surveys--18th century 10 Surveys--Pennsylvania--18th and 19th centuries 7 Land surveys--Pennsylvania--18th century 6 Surveys--Pennsylvania--18th century 5 Land surveys--Pennsylvania--Philadelphia--18th century 4 Surveys--Pennsylvania 4 more ... Surveys--Pennsylvania--19th century 4 Genealogy 3 Land Settlements--Pennsylvania 3 Pennsylvania--Politics and government--18th century 3 Pennsylvania--Surveys 3 Surveys (land)--Pennsylvania--Philadelphia--18th century 3 Surveys (land)--Pennsylvania--Philadelphia--19th century 3 Turnpikes--Pennsylvania--19th century 3 Astronomy--18th century 2 Diaz, Luis P., 1948- 2 Estate administration--19th century 2 Floods--Pennsylvania--Johnstown (Cambria County) 2 Forest nurseries 2 Insurance Surveys--Philadelphia--19th century 2 Ironwork 2 Land Surveys and Field Books 2 Land Warrants-Pennsylvania--18th century 2 Land speculation--Pennsylvania--Federal period 2 Land surveys--Pennsylvania--17th century 2 Land surveys--Pennsylvania--19th century 2 Land surveys--Pennsylvania--Philadelphia--19th century 2 Puerto Ricans--Pennsylvania--Philadelphia--Social conditions 2 Roads--Pennsylvania--18th and 19th centuries 2 Spouses--Correspondence--19th century 2 Stenographers 2 Surveying 2 Surveying--18th century 2 Surveys--Delaware 2 Surveys--Pennsylvania--Chester County--Early 2 Susquehanna County (Pa.) 2 United States. Army of the Potomac 2 United States. Army. Corps of Engineers--History--19th century 2 Accounts--19th century 1 less ...