This is the autobiography of Mary Breckinridge, the woman who founded the Frontier Nursing Service (FNS) in the mountains of eastern Kentucky in 1925. Riding out on horseback, the FNS nurse-midwives proved that high mortality rates and malnutrition did not need to be the norm in rural areas. By their example and through their graduates, the FNS exacted a lasting influence on family health care throughout the world.