Great Central Fair for the U.S. Sanitary Commission (1864 : Philadelphia, Pa.) 2 Spouses--Correspondence--19th century 2 United States. Army of the Potomac 2 United States. Army. Corps of Engineers--History--19th century 2 African Americans--History--Negro Education--Late 19th Century 1 Armenia--History 1 Armenian massacres, 1894-1896 1 more ... Art and Artists--Pennsylvania--Philadelphia--19th century 1 Bull Run, 1st Battle of, Va., 1861 1 Centennial Exhibition (1876 : Philadelphia, Pa.) 1 Charitable Organizations--Philadelphia 1 Cuba--1890-1910 1 Department stores 1 Disaster Relief--National and International 1 Dreer, Ferdinand J. (Ferdinand Julius), 1812-1902 1 Forests and forestry 1 Freemasons--Philadelphia--19th century 1 Gettysburg, Battle of, Gettysburg, Pa., 1863 1 Hydrographic surveying--Mississippi River 1 Indian Rights Association 1 Indians, Treatment of--North America 1 Johnstown Flood 1 Medicine 1 Meteorology--Observations 1 Mexican War, 1846-1848--Campaigns--Maps 1 Newspapers--Pennsylvania--Philadelphia 1 Newspapers--Pennsylvania--Philadelphia--20th century 1 Philadelphia (Pa.)--Newspapers 1 Philippines--Annexation to United States 1 Photographs--Street scenes 1 Poverty, Alleviation of--19th and 20th Century 1 Quakers--Pennsylvania--18th century 1 Russian Famine 1 Sanitation 1 Sanitation--Pennsylvania--Philadelphia 1 Seminole War, 2nd, 1835-1842 1 Slavery 1 Spanish-American War, 1898 1 Spanish-American War, 1898--Campaigns--Cuba 1 Spanish-American War, 1898--Campaigns--Puerto Rico 1 less ...