A Mystery of Medieval Ireland Christmas, 1510; the Burren, West coast of Ireland. Mara, Brehon of the Burren, has accepted the offer of marriage made by King Turlough Donn O'Brien, ruler of that tiny kingdom of stony land and terraced mountains on the shores of the Atlantic Ocean. The marriage is planned to take place at the Cistercian Abbey on Christmas Day. But, on the eve of the marriage festivities, a man kneeling in prayer beside the tomb of...