Una Kroll, MD, is a doctor and priest who practiced many years in a pastoral setting. A devoted campaigner for sexual equality, she was one of the first group of women to be ordained priests in the Church in Wales. She was made deaconess in the Church of England in 1970. She is the author of several books including Trees of Life: The Prayer of Intercession and its Cost. She lives in Wales where she has devoted herself to a solitary life of prayer.