REMOVE

1. Mining
2. Thompson, A.H.
3. Emmons, S.F.
4. Spurr, J.E.

WHAT

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

WHERE

1. Africa (1)
2. Arabian Peninsula (1)
3. East Africa (1)
4. Egypt (1)
5. Madagascar (1)

WHO

1. Bar, J.C. (1)
2. Baumgarten, F. (1)
3. Behrens, W. (1)
4. Berghaus, H. (1)
5. Edler (1)

WHEN

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