Warren Angus Ferris
... that while working for the American Fur Company, trapper Warren Angus Ferris was one of the first people to map and describe Yellowstone?
... that while working for the <a href="./American_Fur_Company" id="mwBLU" rel="mw:WikiLink" title="American Fur Company">American Fur Company</a>, trapper <b id="mwBLY"><a href="./Warren_Angus_Ferris" id="mwBLc" rel="mw:WikiLink" title="Warren Angus Ferris">Warren Angus Ferris</a></b> was one of the first people to map and describe <a href="./Yellowstone_National_Park" id="mwBLg" rel="mw:WikiLink" title="Yellowstone National Park">Yellowstone</a>?