REMOVE

1. Data Visualization
2. Separate Map
3. Nevada
4. Virginia City (Nev.)

WHAT

1. Mining (1)
2. Panorama Round (1)
3. Pictorial map (1)

WHERE

1. Washoe (1)

WHO

1. Cooper, J.J. (1)
2. Edward Vischer (1)
3. Nagel, Fishbourne & Kuche … (1)
4. Vischer, Edward (1)

WHEN

1. 1861 (1)