Genealogy 38 Archives 36 Manuscripts, American 30 World War, 1939-1945 21 History 20 United States--History--Revolution, 1775-1783 17 Family life--Pennsylvania--20th century 12 more ... Genealogical correspondence 11 Manuscripts 11 Sources 11 Family life--Personal correspondence--20th century 10 Pennsylvania--Genealogy 10 Personal Correspondence 10 Social life and customs--19th century 10 Genealogy & local history 9 International trade--19th century 9 United States--History--Civil War, 1861-1865--Personal Correspondence 9 Centennial Exhibition (1876 : Philadelphia, Pa.) 8 Charitable Organizations--Philadelphia 8 Family life--Pennsylvania--19th century 8 Family life--Personal correspondence--19th century 8 Pennsylvania--History--Colonial period, ca. 1600-1775 8 African American families 7 African Americans--Pennsylvania--Philadelphia 7 African Americans--Pennsylvania--Philadelphia--Societies, etc 7 Clubs and Associations--Philadelphia--20th century 7 Family life--Pennsylvania--Philadelphia 7 International trade--18th century 7 Pennsylvania--History 7 Spouses--Correspondence-–20th century 7 World War, 1914-1918 7 World War, 1939-1945--Personal narratives, American 7 Bibliography 6 Family life--Upper Class--19th century 6 Japanese Americans--Evacuation and relocation, 1942-1945 6 Medicine 6 Pennsylvania--Politics and government--19th century 6 Slavery 6 Spouses--Correspondence--19th century 6 Streets 6 less ...