2023-02-272023-02-271900?-1985https://hdl.handle.net/11124/16635Scale approximately 1:600. 50 feet = 1 inch.Pen-and-ink and water color.On sheet 29 x 44 cmmine mapsmanuscript mapsengNo Known Copyright: http://rightsstatements.org/vocab/NKC/1.0/.Mines and mineral resources -- Colorado -- Gilpin County -- MapsStillImage