REMOVE

1. Canals
2. Pocket Map
3. Guide Book

WHAT

1. Railroad (2)
2. Data Visualization (1)

WHERE

1. Hudson River (1)
2. New Jersey (1)
3. New York (1)
4. Pennsylvania (1)
5. United States (1)

WHO

1. Chapin, W. (1)
2. Fagan, John. (1)
3. H.S. Tanner (1)
4. J. & J. Harper (1)
5. Kite, Joseph & William. (1)

WHEN

1. 1830 (1)
2. 1834 (1)
3. 1838 (1)