2023-02-072023-02-071903https://hdl.handle.net/11124/16379Scale approximately 1:600. 50 feet = 1 inch.Pencil on tracing linen.Shows area in Iron Springs mining district near Ophir, including underground workings on Little Eva claim as related to Bootjack, and area of Nunn mine.On sheet 32 x 48 cmmine mapsmanuscript mapsengNo Known Copyright: http://rightsstatements.org/vocab/NKC/1.0/.Mines and mineral resources -- Colorado -- San Miguel County -- MapsIron Springs Mining District (Colo.)StillImage