Born-Digital or AnalogAnalogTranscriptBriggs company Activities, Central City district, Colorado. , 1868. p.4 c.2 Ore production; value, Central City district, Cola. 1874. p.4 c.2 Mill retort; value, Gilpin county. R. M. News.. Apr. 6, 1870. p.4 c.3 Stamp mill damaged, Black Hawk district, Colorado. R. M. News. July 10, 1881. p.3 c.2 Activities, Briggs lode, Gilpin county, Colorado. R. M. News. Aug. 9, 1867. p.4 c.3CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
