Historians--Research Material 20 Historical Society of Pennsylvania--Presidents 2 Africa--Description and Travel--19th century 1 Bethlehem (Pa.)--History 1 Biography--20th century 1 Brant, Joseph, 1743-1807 1 Chester County (Pa.)--History--18th century 1 more ... Chester County (Pa.)--History--19th century 1 Delaware County (Pa.)--History--18th century 1 Historians--19th century 1 Historians--Early 20th Century 1 Historians--Pennsylvania 1 History and Historians--19th century 1 History and Historians--20th century 1 History of Philadelphia 1 Johnstown Flood 1 Journalism--19th century 1 Journalism--20th century 1 Liberty Bell 1 Manors--Pennsylvania--17th century 1 Moravians--Pennsylvania--18th century 1 Penn family 1 Pennsylvania--Bethlehem--History 1 Philadelphia (Pa.)--History--19th century 1 Philadelphia--History 1 Roads--Pennsylvania--18th century 1 Taverns--Philadelphia--18th century 1 less ...