Unlike many of Grey’s fictional novels of the old west, this is an account of a trip made to the North Rim of the Grand Canyon about 1908, for the purpose of tracking and capturing mountain lions. Buffalo Jones was the last of the famous plainsmen who rode the trails of the old West. In a continuing quest to establish dominion over wild animals, Jones leads his men on a journey to capture untamed cougars and bring them back alive. After several run-ins with Navajo, Commanche, Yellow Knife and Great Slave Indians, Jones finally captures his first wild cougar. The story is riveting with many details of the Arizona high desert and Grand Canyon areas of that era and gives a wonderful account of the Ponderosa Pine forest now known as the Kaibab National Forest.