difficult to undo the fixed liturgy lore of their student and early
priest life; and the need of such a book as _The New Psalter and its
Uses_ is, for those interested, a necessity. Even since the publication
of that book, changes have been made. For example, doubles, major or
minor and semi-doubles, which were perpetually excluded on their own day
were transferred to some fixed day. This is given in _The New Psalter
and its Uses_. But this has now been changed. In the case of feasts of
the universal Church, no translation is allowed now. But feasts proper
to a nation, diocese, order, institute or particular church may still be
transferred to a fixed day, if perpetually impeded on their own day.
Another example of necessary changes in that excellent book is in the
last paragraph of page 136 (see Decree S.C.R., June, 1912). The works of
compilers and liturgists need constant revision to keep pace with new
decisions and decrees.

In making commemorations, the order of the commemoration as laid down in
the _Ordo_ should be followed. Elements of a commemoration are the
Antiphon of the _Benedictus_ or the _Magnificat_ with versicle and
response. These antiphons are considered most excellent, preceding as
they do the Gospel canticles (St. Luke I.). The antiphon, versicle and
prayer of the commemoration at an hour should never be repetitions of
others said in the same hour. Thus, if in the office of a confessor
pontiff having the prayer _Da quaesumus_, another confessor pontiff's
feast, commemorated in the same hour, should not have the same prayer.
About the prayer, or, as it is called, the collect, the following should
be noted: first, the commemoration is omitted if the prayer of the
office which is being recited and the prayer of the feast to be
commemorated have the same object. Thus, a feast of the Blessed Virgin,
falling within the octave of the Assumption, should not be commemorated.
Second, where a commemoration for a saint or saints of title similar to