The Twelve Books of John Cassian

 Book I.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Of the modification in the observances which may be permitted in accordance with the character of the climate or the custom of the district.

 Chapter XI.

 Book II.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Book III.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Book IV.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Chapter XIX.

 Chapter XX.

 Chapter XXI.

 Chapter XXII.

 Chapter XXIII.

 Chapter XXIV.

 Chapter XXV.

 Chapter XXVI.

 Chapter XXVII.

 Chapter XXVIII.

 Chapter XXIX.

 Chapter XXX.

 Chapter XXXI.

 Chapter XXXII.

 Chapter XXXIII.

 Chapter XXXIV.

 Chapter XXXV.

 Chapter XXXVI.

 Chapter XXXVII.

 Chapter XXXVIII.

 Chapter XXXIX.

 Chapter XL.

 Chapter XLI.

 Chapter XLII.

 Chapter XLIII.

 Book V.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Chapter XIX.

 Chapter XX.

 Chapter XXI.

 Chapter XXII.

 Chapter XXIII.

 Chapter XXIV.

 Chapter XXV.

 Chapter XXVI.

 Chapter XXVII.

 Chapter XXVIII.

 Chapter XXIX.

 Chapter XXX.

 Chapter XXXI.

 Chapter XXXII.

 Chapter XXXIII.

 Chapter XXXIV.

 Chapter XXXV.

 Chapter XXXVI.

 Chapter XXXVII.

 Chapter XXXVIII.

 Chapter XXXIX.

 Chapter XL.

 Chapter XLI.

 Book VI.

 Book VII.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Chapter XIX.

 Chapter XX.

 Chapter XXI.

 Chapter XXII.

 Chapter XXIII.

 Chapter XXIV.

 Chapter XXV.

 Chapter XXVI.

 Chapter XXVII.

 Chapter XXVIII.

 Chapter XXIX.

 Chapter XXX.

 Chapter XXXI.

 Book VIII.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Chapter XIX.

 Chapter XX.

 Chapter XXI.

 Chapter XXII.

 Book IX.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Book X.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Chapter XIX.

 Chapter XX.

 Chapter XXI.

 Chapter XXII.

 Chapter XXIII.

 Chapter XXIV.

 Chapter XXV.

 Book XI.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Chapter XIX.

 Book XII.

 Chapter I.

 Chapter II.

 Chapter III.

 Chapter IV.

 Chapter V.

 Chapter VI.

 Chapter VII.

 Chapter VIII.

 Chapter IX.

 Chapter X.

 Chapter XI.

 Chapter XII.

 Chapter XIII.

 Chapter XIV.

 Chapter XV.

 Chapter XVI.

 Chapter XVII.

 Chapter XVIII.

 Chapter XIX.

 Chapter XX.

 Chapter XXI.

 Chapter XXII.

 Chapter XXIII.

 Chapter XXIV.

 Chapter XXV.

 Chapter XXVI.

 Chapter XXVII.

 Chapter XXVIII.

 Chapter XXIX.

 Chapter XXX.

 Chapter XXXI.

 Chapter XXXII.

 Chapter XXXIII.

Chapter IV.

How throughout the whole of Egypt and the Thebaid the number of Psalms is fixed at twelve.

So, as we said, throughout the whole of Egypt and the Thebaid the number of Psalms is fixed at twelve both at Vespers and in the office of Nocturns,45 The rule of Cæsarius also prescribes twelve Psalms on every Sabbath, Lord’s day, and festival (c. 25); so also, according to the Benedictine rule, there are twelve Psalms at mattins, besides the fixed ones, iii. and xcv. (see c. 9 and 10), as there are still in the Roman Breviary on ordinary week-days. Book II. c. xiii. in such a way that at the close two lessons follow, one from the Old and the other from the New Testament.46 The custom of having two lessons only appears to have been peculiar to Egypt. Most of the early Western rules give three, e.g., those of Cæsarius and Benedict, while in the Eastern daily offices there are no lections from Holy Scripture. Missa. And this arrangement, fixed ever so long ago, has continued unbroken to the present day throughout so many ages, in all the monasteries of those districts, because it is said that it was no appointment of man’s invention, but was brought down from heaven to the fathers by the ministry of an angel.