Subject
Gold mines and mining
75
Gold mines and mining History
18
Cripple Creek (Colo.) History
8
Colorado
7
Colorado History
7
Geology
7
Silver mines and mining
7
Colorado Gold discoveries
6
Silver mines and mining History
6
Treasure troves
6
Colorado Description and travel
5
Legends
5
Georgetown (Colo.) History
4
Frontier and pioneer life
3
Kansas
3
Kansas Description and travel
3
Mines and mineral resources
3
Nebraska
3
Pikes Peak (Colo.)
3
West (U.S.)
3
Cripple Creek (Colo.)
2
Cripple Creek Mining District (Colo.) History
2
Cripple Creek Region (Colo.) History
2
Extinct cities
2
Gilpin County (Colo.)
2
Gilpin County (Colo.) History
2
Gold mines and mining Finance History
2
Hydraulic mining
2
Mineral industries Finance History
2
Mines and mineral resources History
2
Ore deposits
2
Pioneers
2
Placer mining
2
Prospecting
2
Silver mines and mining Finance History
2
Boulder (Colo.) History
1
Boulder County (Colo.) History
1
Businessmen
1
Businesspeople
1
Clear Creek County (Colo.)
1
Coaching (Transportation)
1
Coal mines and mining
1
Colorado History, Local
1
Colorado Springs (Colo.) Description and travel
1
Cripple Creek (Colo.) Description and travel
1
Cripple Creek Mining District (Colo.)
1
Cripple Creek Region (Colo.)
1
Denver (Colo.) Social life and customs
1
Fluorspar
1
Folklore and history
1
more ...