“It generally comes as quite a surprise when people discover that there are still men who practice this ancient art with as much skill and frequency as did the early cowboy and Indian. These men not only track other human beings almost daily, but actually earn their living at it. The United States Border Patrol has been charged with the responsibility of apprehending aliens who try to enter the United States illegally, and the practice of tracking these aliens, of actually following their “sign” through the rugged back country, is a technique that is as old as the Border Patrol itself”

Jack Kearney, taken from “Tracking: a blueprint for learning how” (Pathways Press, 1986)