REMOVE

1. Railroad
2. Brose, W.
3. T.R. Tanner & J. Disturnell

WHAT

1. Canals (10)
2. Guide Book (10)
3. Book Map (5)
4. Text Page (3)

WHERE

1. United States (3)
2. New York (2)
3. Pennsylvania (2)
4. Chesapeake and Delaware C … (1)
5. Erie Canal (N.Y.) (1)

WHO

1. Knight, J. (10)
2. Tanner, Henry S. (10)

WHEN

1. 1840 (10)