Business enterprises 6 Family life--Pennsylvania--20th century 5 Centennial Exhibition (1876 : Philadelphia, Pa.) 4 Family life--Personal correspondence--20th century 4 Genealogy 4 Spouses--Correspondence-–20th century 4 Clubs and Associations--Philadelphia--20th century 3 more ... History 3 Museums--Pennsylvania--Philadelphia--20th century 3 Pennsylvania--History 3 Philadelphia (Pa.)--Politics and government--20th century 3 Quakers--Pennsylvania--18th century 3 Slavery 3 Spouses--Correspondence--19th century 3 Theater--Pennsylvania--Philadelphia 3 United States--History--Revolution, 1775-1783 3 Urban renewal--Pennsylvania--Philadelphia 3 Women's History--Clubs and Organizations 3 Women's history--Pennsylvania--Philadelphia 3 World War, 1939-1945 3 AIDS (Disease) 2 Affirmative action programs--Government policy--United States--History--20th century 2 Artists--Correspondence 2 Banks and banking--Pennsylvania 2 Books and Bookselling--19th Century 2 Burial records 2 Business and manufacturing--Pennsylvania--Philadelphia--20th century 2 Cemeteries–-Pennsylvania 2 Charities--Pennsylvania--Philadelphia 2 Children's diaries, American 2 Clubs and Associations--20th Century 2 Coal Industry--20th century 2 Coal mines and mining--Pennsylvania 2 Community theater--Pennsylvania--Philadelphia 2 Deeds--18th Century 2 Diaries--20th century 2 Engineering--Pennsylvania--Philadelphia 2 Family life--Pennsylvania--19th century 2 Family life--Pennsylvania--Philadelphia 2 Freemasons--Philadelphia--19th century 2 less ...