2019-12-132022-02-032019-12-132022-02-03https://hdl.handle.net/11124/173944Donor: Colorado Mining Association.Caption reads: "A. H. Ray, Mine Super, Minnie B. mines."7 x 5 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Underground mining -- ColoradoRay, A. H.Silver mines and mining -- ColoradoLead mines and mining -- ColoradoMiners -- ColoradoMinnie B. Mine (Colo.)StillImage