History 26 Genealogy 14 Wills 10 Sources 9 Natural history 7 Politics and government 6 Genealogical correspondence 5 more ... Probate records 5 Public buildings 5 United States--History--Revolution, 1775-1783 5 Family life--Pennsylvania--20th century 4 Pennsylvania--History 4 Pennsylvania--History--Colonial period, ca. 1600-1775 4 Registers of births, etc 4 Church records and registers 3 Courthouses 3 Histoire 3 Historic buildings 3 Land tenure 3 Landowners 3 Local transit--Pennsylvania--Philadelphia 3 Medicine 3 Municipal officials and employees--Pennsylvania--Philadelphia 3 Native Americans 3 Pennsylvania--Genealogy 3 Philadelphia (Pa.)--City planning 3 Philadelphia (Pa.)--Officials and employees 3 Philadelphia (Pa.)--Politics and government--20th century 3 Quakers--Pennsylvania--18th century 3 Slavery 3 Taxation 3 Urban renewal--Pennsylvania--Philadelphia 3 African American universities and colleges 2 Anniversaries, etc 2 Archives 2 Art and Artists--Pennsylvania--Philadelphia--19th Century 2 Artists--Correspondence 2 Balch Institute for Ethnic Studies 2 Botany 2 Campaign management--United States 2 less ...