VII.--Amalarius, Bishop of Trèves (809-814). _Liber Officiorum_, from a MS. at Trèves, quoted by Morin, _fol._ 6, _De Missa Innocentium_. "The Mass of the Innocents begins in the Diurnal with this Rubric: '_Gloria in Excelsis Deo_ is not sung, nor _Alleluia_, unless it be Sunday; this day is passed in a sort of sadness.' The Holy Pope Gregory, in whom dwelt in very truth the Holy Ghost, and to whom is due the composition of this office, means us to share the feelings of the pious women who bewailed and lamented the death of the Innocents. And if it is permitted to transgress the order of so great a Father, it would equally be lawful to chant Alleluia with the complete office of the day on Good Friday." It is a question here of the Antiphoner of the Mass. (_fol._ 7.) On the day of the Epiphany "we lose one of the chants which we have at Christmas, viz., the Invitatory. St. Gregory, the organizer of the offices, meant by this peculiarity to recall to our memory as strongly as he could what passed formerly at the time of the accomplishment of the mysteries which we honour. That is why we chant in the sixth place the psalm which we had avoided in the beginning. It is true that certain blunderers treat this with indifference and contempt, thinking it much better to follow the ordinary usage of each day. But, as we have already said, he wished by this to distinguish" &c., &c. This passage refers to the Antiphoner of the Office. (_fol._ 9-10.) "That is why Gregory, the author of our office, has placed Septuagesima.... However, Gregory the institutor of our office...." It is a question of the Antiphoner and of the Sacramentary. (_fol._ 39.) "The author of our office, who is none other than Gregory...." He is referring to a portion of the Antiphoner of the Mass. In the following passage Amalarius distinguishes the work of the two first Gregories as to the Thursdays in Lent. (_fol._ 102.) "The Holy Pope Gregory in arranging the offices of the year had left vacant the Thursdays of Lent.... A long time after him another Pope, Gregory the younger, ordained that these days should also be celebrated by Masses and Prayers, but with less solemnity, and he borrowed wherever he could material to form the offices of these Thursdays." VIII.--Pope Adrian I. (772-795). A MS. from Saint Martial de Limoges contains this passage (_Paris, Bibl. Nat., No._ 2400.) "Adrian II., after the example of his predecessor of the same name, completed the Gregorian Antiphoner in several places. He also arranged a second prologue in hexameter verse to be chanted at High Mass on the first day of Advent. This prologue begins in the same way as another very short one composed by the first Adrian to be sung at all the Masses of this first Sunday in Advent, but that of Adrian II. is composed of a greater number of verses."