History Sources 24 Economic conditions 22 Finance, Public 22 Taxation 22 Appropriations and expenditures 15 Militia 15 more ... Genealogy 3 Iron industry and trade 3 Revolution 3 Street-railroads 3 Authors, American 2 Cemeteries 2 Court records 2 Histoire 2 Historic buildings 2 Iron foundries 2 Postcards 2 Publishers and publishing 2 Quakers 2 Railroads 2 Registers of births, etc 2 Registers, lists, etc 2 Trolley cars 2 Underground Railroad 2 African American soldiers 1 African Americans 1 American newspapers 1 American periodicals 1 Antislavery movements 1 Architecture 1 Biography 1 Brandywine, Battle of, Pa., 1777 1 Buildings 1 Buildings, structures, etc 1 Buses 1 CHR 1899 1 Ceramic industries 1 Commissioners 1 County government 1 less ...