REMOVE

1. Pocket Map
2. Poole Brothers

WHAT

1. Book Map (5)
2. Guide Book (3)
3. Railroad (3)
4. Exploration Book (2)
5. Canals (1)

WHERE

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

WHO

1. American Hotel register C … (2)
2. Leahy, J.F. (2)
3. Melish, John (2)
4. Palmer, Thomas & George (2)
5. Southern Pacific Company (2)

WHEN

1. 1812 (2)
2. 1934 (2)
3. 1840 (1)