Ripley, WinfieldMarks, John H. (John Henry)2018-11-192022-02-032018-11-192022-02-03https://hdl.handle.net/11124/172796Mine report no. 997.Also includes two letters of correspondence.reportsengIn copyright - non-commercial use permitted (http://rightsstatements.org/vocab/InC-NC/1.0/).Mines and mineral resources -- Colorado -- Costilla CountyMining claims -- Colorado -- Costilla CountyGrayback Mountain (Colo.)Text