These photos by JR Moore were taken in the Kern River/Whitney Creek region of California in 1897. Ridgway wrote of this trip in an article that appeared in the October, 1898 issue of Outing magazine. I can't begin to do justice to his description of this adventure and I encourage you to read it for yourself here:
http://www.aafla.org/SportsLibrary/Outing/Volume_33/outXXXIII01/outXXXIII01e.pdf