Frederick Temple, Archbishop of Canterbury, and William Maclagan, Archbishop of York, answered Pope Leo's charges in their written response, "Saepius officio: Answer of the Archbishops of Canterbury and York to the bull "Apostolicae Curae" of H.H. Leo XIII". It was written to prove the sufficiency of the form and intention used in the Anglican ordinal rites since the time of the English Reformation. According to this view, the required references to the sacrificial priesthood never existed in many ancient Catholic ordination liturgies and also in certain current Eastern-rite ordination liturgies that the Roman Catholic Church considered valid.