REMOVE

1. Guide Book
2. Book Map
3. Canals
4. New Jersey
5. Pennsylvania

WHAT

1. Atlas Map (1)
2. World Atlas (1)

WHERE

1. Belgium (1)
2. Netherlands (1)

WHO

1. Alt (1)
2. Bar, J.C. (1)
3. Berghaus, H. (1)
4. Edler (1)
5. Justus Perthes (1)

WHEN

1. 1850 (1)
2. 1851 (1)