Author
Baltimore and Ohio Railroad Company
3
Baltimore and Ohio Railroad Company. Board of Engineers
1
Little Schuylkill and Susquehanna Rail Road Company
1
Long, Stephen H. 1784-1864
1
Pamphlet Collection (Library of Congress)
1
Pennsylvania. Board of Canal Commissioners
1
Philadelphia & Reading Railroad Co
1
Roberts, Solomon White, 1811-1882
1
Robinson, Moncure, 1802-1891
1
Robinson, Wirt
1
Sullivan, John L. 1777-1865
1