After the sermon and the singing by the papal choir of the first strophe of the hymn _Veni Creator_, the cardinals ascend in procession to the Pauline Chapel in the Vatican palace, where the dean recites aloud before the altar the prayer _Deus qui corda fidelium_, and afterwards addresses his brethren on the great business which they are about to engage in, exhorting them to lay aside all human motives and perform their duty without fear or favor of any man. All the persons who are to remain in conclave, as the prelates, custodians, conclavists or attendants on the cardinals, physicians, barbers, servants, are passed in review, and take an oath not to speak even among themselves of matters concerning the election. Every avenue leading into the conclave, except the eight loop-holes or windows, as mentioned in a former article, are carefully closed by masons; one door, however, is left standing to admit any late-coming cardinal, or let out any one expelled from, or for whatever cause obliged to leave, the conclave. It is locked on the outside by the prince-marshal, and on the inside by the cardinal-chamberlain, both of whom retain the key of their own side. The lock is so combined that it requires both keys to open the door. On the following day the cardinal-dean says a votive Mass _de Spiritu Sancto_, at which all the cardinals in stoles receive Holy Communion from his hands.... _Fervet opus_.... * * * * * As soon as the cardinal upon whom the requisite two-thirds of all the votes cast have centred consents to his election, he becomes pope. This consent is absolutely necessary, and, although the Sacred College threatened Innocent II. (Papareschi, 1130-1143) with excommunication if he did not accept,[33] it is now admitted that no one can be constrained to take upon himself such a burden as the Sovereign Pontificate.