Loyalty to the Prayer Book has become a battle-cry. as such it is used to confound one's enemies, and hence does not always become a principle of personal practice or intelligent action on the part of those who proclaim it. Loyalty to the Prayer-Book implies knowledge and sympathetic understanding of our liturgy. For the Prayer-Book is the result of a long evolution in worship, and that evolution still continues. When liturgy ceases to develop, as with any other thing, it is dying or dead. "Stick to the Prayer-Book" may be good advice. But those who give it are often those who do not realize that Prayer-Book Offices cannot -simply cannot- be celebrated if one sticks to the Prayer-Book in the sense of doing no more than what is therein ordered. Are there to be vestments? Not even the surplice and stole is ordered. Cross and candles? There is no Prayer-Book authority for them. Of ceremonial customs there is little. Vested choirs, processions, processional Crosses, flags and banners, and many other things dear to the heart of the "Prayer-Book Churchmen," are unmentioned. Music is ordered, but none is provided. Hymns are permitted but only one hymn, the Veni Creator, is given. The use of most of these things is the result of following, not Prayer-Book directions, but the living Catholic tradition of the church. In other words, the Prayer-Book Rite must be treated as an apocopated liturgy, for that is precisely what it is. That is to say, our liturgy cannot be celebrated without the addition of material or knowledge which the Prayer-Book fails to supply. And when such supplementary material and the Prayer-Book Eucharistic formularies are published together as one book, the result is called a 'Missal.' Now it is impossible to publish such a book and please everybody. One person wishes little in the way of such additions. Another wishes much. To be of wide service, such a book should be inclusive rather than exclusive, and those who believe in the guidance by the Holy Spirit of the Church will not doubt that the evolutionary process, which is so characteristic of the Western Liturgy, will surely, if slowly, eliminate that which is unworthy.