Real property 25 Maps 17 Private schools 14 History 11 Natural history 9 Genealogy 8 Histoire 4 more ... United States--History--Revolution, 1775-1783 4 Deeds--18th Century 3 Description and travel 3 Genealogical correspondence 3 Land speculation and settlement--Pennsylvania--19th century 3 Land speculation--United States 3 Naturalization records 3 Pennsylvania--History--Colonial period, ca. 1600-1775 3 Quakers 3 Registers of births, etc 3 Slavery 3 Travel 3 World War II, 1939-1945--Personal Correspondence--Home front 3 World War, 1914-1918 3 World War, 1939-1945 3 African American families 2 African Americans 2 Atlas 2 Banks and banking--Pennsylvania 2 Bible records 2 Botany 2 Campaign management--United States 2 Cemeteries–-Pennsylvania 2 Centennial Exhibition (1876 : Philadelphia, Pa.) 2 Child welfare 2 Church buildings 2 City & town halls 2 Clubs and Associations--20th Century 2 Clubs and Associations--Pennsylvania--Philadelphia 2 Coal Industry--20th century 2 Coal mines and mining--Pennsylvania 2 Collectors and collecting 2 Descriptions et voyages 2 less ...