W.L. Hardison and the Santo Domingo Mine

In 1895 he [WL Hardison] became interested in the oil business in Peru, S. A., and went there to investigate the fields, but did not find them promising, and reported adversely to the English syndicate that controlled them. This visit, however, resulted in his becoming interested in a rich gold mine in the Andes mountains, about one hundred and fifty miles from Arequipa and for the purchase of which he formed a company called the Inca Mining Company, of which Charles P. Collins was president, and active preparations for its development were begun at once.
Accompanied by his son Guy, his nephews Chester W. and Fred Brown, and A. C. Hardison, he went again to Peru, where he gave personal supervision for two or three years to the work of carrying forward this large and difficult enterprise.
Leaving this work finally in the hands of others, he returned again to the United States[...]

Taken from "Our Folks and Your Folks -- A Volume of Family History and Biographical Sketches" by Florence Collins Porter and Clara Wilson Gries, Los Angeles, Ca, The Fred Lang Company, 1919