Sister Mary Katherine Doyle has been a Sister of Mercy of the Americas for over fifty-five years. Trained as a historian at the University of San Francisco, she has always been drawn to the human side of history. Fascinated by the Mercy story, she wrote Like a Tree by Running Water: The Story of Mary Baptist Russell, California’s First Sister of Mercy, published in 2004. Recognized as a passionate storyteller, Sister Katherine presents the story of the Sisters of Mercy in Sacramento through the perspective of a historian and of one who has lived that story herself.