Spouses--Correspondence--19th century 6 Genealogy 2 Gettysburg, Battle of, Gettysburg, Pa., 1863 2 Spouses--Correspondence-–20th century 2 United States. Army of the Potomac 2 United States. Army. Corps of Engineers--History--19th century 2 Antietam, Battle of, Md., 1862 1 more ... Appomattox Campaign, 1865 1 Children's diaries, American 1 Chinese Americans 1 Family life--Pennsylvania--18th century 1 Family life--Pennsylvania--19th century 1 Family life--Pennsylvania--20th century 1 Family life--Pennsylvania--Philadelphia 1 Family life--Pennsylvania--Philadelphia--19th century 1 Hydrographic surveying--Mississippi River 1 Korean War, 1950-1953 1 Mexican War, 1846-1848--Campaigns--Maps 1 Military Order of the Loyal Legion of the United States 1 Nez Perce Indians--Wars, 1877 1 Quakers--Pennsylvania--18th century 1 Real estate--Pennsylvania--Philadelphia--19th century 1 School Books--19th century 1 Seminole War, 2nd, 1835-1842 1 Sioux nation 1 Slaves--Jamaica--Social conditions--18th century 1 Spouses--Correspondence--18th century 1 Topographical surveying--United States 1 United States--History--Revolution, 1775-1783 1 United States. Army. Corps of Engineers 1 World War, 1939-1945 1 less ...