Other
Railroad--Construction
2
Banking law--United States--History
1
Compromise of 1850
1
Gettysburg, Battle of, Gettysburg, Pa., 1863
1
Lumber trade--Pennsylvania--New Hope
1
Mexican War, 1846-1848
1
Mexican War, 1846-1848--Campaigns--Maps
1
Roads--Design and construction
1
Scott, Dred
1
Slavery
1
Spouses--Correspondence--19th century
1
Topographical surveying--United States
1
United States--Latin American relations
1
United States. Army of the Potomac
1
United States. Army. Corps of Engineers--History--19th century
1
Wilmot proviso
1