April 18th Dominica in Albis

Dominica in Albis or Low Sunday is of double rite. The Gospel at Mattins and Mass is the account of the LORD appearing in to His disciples behind the shut doors of the room and the doubting of St. Thomas.

At Vespers yesterday the psalms of Saturday (Pss. 143, 144, 145, 146 & 147) were sung under the single antiphon, Alleluia. Chapters and hymns returned to the Office. The Paschaltide hymn Ad cenam Agni providi was sung. Its Doxology is sung at all hymns of Iambic metre: Gloria tibi Domine, Qui surrexisti a mortuis, Cum Patre et Sancto Spiritu, In sempiterna saecula. From this Office the dismissal, Benedicamus Domino, is sung without the double Alleluia that had been sung since Pascha.

At Mattins the invitatory Surrexit Dominus vere Alleluia continues to be sung. The Office hymn is O Rex aeterne Domine. In the first nocturn psalms 1, 2, 3, 6, 7, 8, 9, 10, 11, 12, 13 & 14 are sung under a single antiphon Alleluia, Lapis revolutus etc. The lessons in the first nocturn are from the Epistle of St. Paul to the Colossians; the first begins Igitur si consurrexistis otherwise it and the other two first nocturn lessons are same as in modern editions. In the second nocturn psalms 15, 16 & 17 are sung under the single antiphon Alleluia, quem quaeris mulier etc. The lessons are from a sermon of St. Augustine and are the same as in the modern editions. In the third nocturn psalms 18, 19 & 20 are sung under the single antiphon Alleluia, noli flere Maria etc. The homily is from the writings of St. Gregory on St. John's Gospel and the same same as in modern editions except they are missing the words 'Dixit eis' at the beginning of the ninth lesson. The Te Deum is sung.

At Lauds the Sunday psalms (Pss. 92, 99, 62-66, Benedicite, 148, 149 & 150) are sung under a single antiphon, a nine-fold Alleluia - an ancient feature of the Roman rite destroyed in the 1911-13 reform. The Office hymn is Aurora lucis rutilat.

At Prime the Dominical psalms 53, 118(i), 118(ii) and Quicumque are sung under the antiphon Alleluia. At the other Little Hours Alleluia is also sung as the antiphon, the hymns have the Paschal Doxology.

Mass is sung after Terce. Before Mass the antiphon Vidi aquam is sung during the aspersion. At Mass the Gloria is sung, there is a single collect. The Creed is sung and the preface is of Paschatide.

Vespers are First Vespers of the transferred feast of St. Leo. After the collect of the feast a commemoration of the Sunday is sung.