CHAPTER XII. How the Solemn Office of Lauds is to be said
14 Feb. 15 June. 15 Oct.
At Lauds on Sunday let the sixty-sixth Psalm first be said straight on without an antiphon. After this let the fiftieth Psalm be said, with an Alleluia, and then the hundred and seventeenth and the sixty-second. Then the Benedicite and Psalms of praise, a lesson from the Apocalypse, said by heart, a responsory, a hymn, a versicle, a canticle out of the Gospel, and the Litany, and so end.

Psalm 50, the Miserere, occurs at Lauds every Sunday and weekday. John Mason Neale calls it, “the Psalm of all Psalms; that which of all inspired compositions has, with the one exception of the Lord’s Prayer, been repeated oftenest by the Church.” Saint Thomas says that in the numbering of the Psalms, this Psalm is the fiftieth and this is the number of jubilee as is described in Leviticus 27 in which a remission of all debts was made, whence this number agrees with this Psalm in which he treats of full remission of sins. Psalm 50 is,

CHAPTER XI. How the Night-Office is to be said on Sundays
13 Feb. 14 June. 14 Oct.
On Sunday let the brethren rise earlier for the Night-Office, which is to be arranged as follows. When six Psalms and a versicle have been sung (as already prescribed), all being seated in order in their stalls, let four lessons with their responsories be read from the book, as before: and to the last responsory only let the reader add a Gloria, all reverently rising as soon as he begins it. After the lessons let six more Psalms follow in order, with their antiphons and versicle as before; and then let four more lessons, with their responsories, be read in the same way as the former. Next let three canticles from the Prophets be said, as the Abbot shall appoint, which canticles are to be sung with an Alleluia. After the versicle, and the blessing given by the Abbot, let four more lessons from the New Testament be read as before; and at the end of the fourth responsory, let the Abbot begin the hymn, Te Deum laudamus.

CHAPTER IX. How many Psalms are to be said at the Night Hours
11 Feb. 12 June. 12 Oct.
In winter time, there is first the versicle, “O Lord, Thou wilt open my lips, and my mouth shall declare Thy praise,” to be said three times; then the third Psalm, with a Gloria, after which the ninety-fourth Psalm is to be said or sung, with an antiphon. Next let a hymn follow, and then six Psalms with antiphons. These being said, and also a versicle, let the Abbot give the blessing and, all being seated, let three lessons be read by the brethren in turns, from the book on the lectern. Between the lessons let three responsories be sung – two of them without a Gloria, but after the third let the reader say the Gloria: and as soon as he begins it, let all rise from their seats out of honour and reverence to the Holy Trinity. Let the divinely inspired books, both of the Old and New Testaments, be read at the Night-Office, and also the commentaries upon them written by the most renowned, orthodox and Catholic