II.
1º. At High Mass, ought the celebrant to elevate the Host before the choir has terminated the singing of the Sanctus and following words?
Answer: The Caeremoniale Episcop. lib. ii. no. 70, gives the answer: "Chorus prosequitur cantum usque ad Benedictus qui venit exclusive: quo finito et non prius elevatur sacramentum. Tunc silet chorus et cum aliis adorat. Organum vero, si habetur, cum omni tunc melodia et gravitate pulsandum est". The celebrant ought to proceed slowly with the canon, so as to give time to the choir to terminate their part before he comes to the elevation. The choir ought to be cautioned not to protract the singing of the Sanctus too much.
2º. At High Mass, when the celebrant has sung "Et ne nos inducas in tentationem", in the Pater Noster, is he bound to wait until the choir has finished singing "Sed libera nos a malo", before he says Amen?
Answer: According to a ceremonial much esteemed in Rome, published by a missionary of St. Vincent, in Bologna, 1854, l. iv. no. 1484, the priest is bound to wait. The choir agit partem ministri in its answers at High Mass, and on that account the priest must wait until it responds to him, as on other occasions he waits until the server or clerk terminates his answers.
After the priest has sung "Pax Domini sit semper vobiscum", he must also wait until the choir has sung "Et cum spiritu tuo", before he says "Haec commixtio", etc.
3º. When the deacon has sung "Ite Missa est", can the celebrant, without waiting for the choir to answer "Deo gratias", turn to the altar and say the prayer "Placeat"?
Answer: The Caeremoniale, Ep. l. ii. c. viii. no. 78, says: "Diaconus vertit faciem ad populum, renes autem celebranti ... et cantat (Ite missa est) ... quo dicto, ipse et celebrans simul vertunt se per latus epistolae ad altare, et celebrans dicit (Placeat tibi, S. Trinitas, etc)". As the singing of "Deo gratias" occupies so short a time, it will terminate before the priest can turn to the altar; in any case, he ought not to commence the Placeat until the choir has responded.