REMOVE

1. Canals
2. S.A. Mitchell

WHAT

1. Guide Book (3)
2. Railroad (3)
3. Atlas Map (2)
4. Book Map (1)

WHERE

1. Colombia (1)
2. Erie Canal (N.Y.) (1)
3. New York (1)
4. Panama (1)
5. South America (1)

WHO

1. Mitchell, Samuel Augustus (5)
2. Fagan, John (3)
3. Evans (1)
4. Tanner, Henry S. (1)

WHEN

1. 1835 (3)
2. 1846 (1)
3. 1880 (1)