In the late 1800s, Thomas Elwood "Billy" Hofer became nearly as much a fixture of Yellowstone National Park as Old Faithful Geyser. As a wilderness guide, wildlife census taker, explorer, and expert skier, tracker, and naturalist, Hofer acquired a vast and intimate knowledge of all things Yellowstone. He became the go-to expert for presidents and politicians, park service professionals and intrepid reporters. Through numerous articles in Forest...