Diplomatic and consular service, American 2 History 2 Politics and government 2 Slavery 2 Family life--Pennsylvania--18th century 1 Family life--Pennsylvania--19th century 1 Family life--Pennsylvania--20th century 1 more ... Korean War, 1950-1953 1 Lumber trade--Pennsylvania--New Hope 1 Quakers--Pennsylvania--18th century 1 Railroad--Construction 1 Roads--Design and construction 1 Spouses--Correspondence--18th century 1 Spouses--Correspondence--19th century 1 Spouses--Correspondence-–20th century 1 United States--History--Revolution, 1775-1783 1 World War, 1939-1945 1 less ...