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Subject
- Gold discoveries7
- Gold mines and mining7
- Nautical charts5
- Geology4
- Indians of North America4
- Administrative and political divisions3
- Harbors3
- Surveys3
- Copper mines and mining2
- Landowners2
- Mines and mineral resources2
- Real property2
- Roads2
- Discovery and exploration1
- Land grants1
- Mercury mines and mining1
- Mexican War, 1846-18481
- Mining and mining resources1
- Ocean currents1
- Shipping1
