Family life--Pennsylvania--20th century 5 Family life--Personal correspondence--20th century 4 Personal Correspondence 4 Spouses--Correspondence-–20th century 4 United States--History--Revolution, 1775-1783 4 Family life--Pennsylvania--19th century 3 Pennsylvania--History--Colonial period, ca. 1600-1775 3 more ... Slavery--United States--History 3 World War, 1939-1945 3 World War, 1939-1945--Correspondence 3 Books and Bookselling--19th Century 2 Booksellers and bookselling -- Pennsylvania -- Philadelphia 2 Economics--19th century 2 Family life--Pennsylvania--Philadelphia 2 Genealogy 2 Husband and Wife--Correspondence 2 International trade--19th century 2 Medicine 2 Municipal government--Pennsylvania--Philadelphia 2 Municipal officials and employees--Pennsylvania--Philadelphia 2 Pennsylvania--Politics and government 2 Philadelphia (Pa.)--City planning 2 Philadelphia (Pa.)--Race relations--History--20th century 2 Publishers and publishing 2 Publishing 2 Publishing--19th century 2 Selling--Books 2 Slavery--Law and legislation--United States--History 2 Social reformers--Pennsylvania--Philadelphia 2 Soldiers--Family relationships--United States--History--20th century 2 Spanish-American War, 1898--Campaigns--Cuba 2 Spanish-American War, 1898--Campaigns--Puerto Rico 2 Urban renewal--Pennsylvania--Philadelphia 2 Women in politics 2 Women--Suffrage 2 World War II 2 World War II, 1939-1945--Personal Correspondence--Home front 2 World War, 1914-1918 2 World War, 1914-1918--Personal correspondence 2 Aeronautics, Commercial--Law and legislation--United States 1 less ...