lla; the deacon goes up to the
altar, genuflects, takes the ostensorium, hands it to the celebrant, and
then kneels on the epistle side of the predella. The celebrant, having
received the ostensorium, rises, gives the benediction, consigns the
ostensorium to the deacon, and kneels once more on the extremity of the
predella. The deacon, after receiving the ostensorium, stands up, places
it on the corporal, and restores the Blessed Sacrament to the
tabernacle. Meantime the celebrant, laying aside the veil, descends to
his place at the foot of the altar, as soon as the Blessed Sacrament has
been removed.

3. It is clear that in such case he ought to follow the general Rubric.
The Ordo is intended to set forth the application of liturgical rules to
particular cases; and it is no wonder that in a task so minute, errors
should sometimes occur. But if the mistake be not clearly and evidently
such, the priest should follow the Ordo. "When the bishop publishes a
directory", says M. Falise (pag. 276, 3rd edition), "the priests of the
diocese are bound to conform to it not only in what is certain, but also
in questions on which a difference of opinion exists among authors, and
even when the contrary of what is prescribed appears certain. But this
rule does not hold when the regulations are evidently contrary to the
Rubrics". The following decrees bear on this point:--

1ST DECREE. _Question._ "An in casibus dubiis adhaerendum est
kalendario dioecesis, sive quoad officium publicum et privatum,
sive quoad Missam, sive quoad vestium sacrarum colorem, etiamsi
quibusdam probabilior videtur sententia kalendario opposita? Et
quatenus affirmative, an idem dicendum de casu quo certum alicui
videretur errare kalendarium?" _Answer._ "Standum kalendario".
(Decree 23 May, 1833, n. 4746, q. 2).

2ND DECREE. _Question._ " ... 6. Cum pro nonnullis sanctis propriis
regni Hispaniarum de quibus recitatur officium ritu dupl. min.
habeantur lectiones primi nocturni de communi, pro aliis vero de
scriptura occurrente, quaeritur quae certa regula servari debeat
quoad numeratas primi nocturni lectiones in officiis duplicibus
minoribus? 7. An quoad easdem lectiones primi nocturni in
duplicibus minoribus standum sit dispositionibus directorii, vel
breviarii? 8. An licitum sit in duplicibus minoribus, et etiam
semiduplicibus, lectiones primi nocturni pro lubitu desumere vel de