of the cathedral chapter of Verona, was published by Joseph Bianchini in 1735, and was by him attributed arbitrarily to Pope Leo I (440-61). On the strength of this attribution the book still bears the name Leonine. It represents a pure Roman use with no Gallican elements. But it is not a book compiled for use at the altar. The confusion of its parts shows this. It is a fragment, containing no Canon nor Ordinary of the Mass, but a collection of Propers (Collects, Secrets, Prefaces, Postcommunions, and Orationes super populum), of various Masses with ordination forms, arranged according to the civil year. It begins in the middle of the sixth Mass for April, and ends with a blessing for the font "In ieiunio mensis decimi" (i. e. the winter Ember days). In each month groups of Masses are given, often very large groups, for each feast and occasion. Thus, for instance, in June we find twenty-eight Masses for St Peter and St Paul, one after another, each headed: "Item alia"; there are fourteen for St Lawrence, twenty-three for the anniversary of a bishop's consecration, and so on. Evidently the writer has compiled as many alternative Masses for each occasion as he could find. In many cases he shows carelessness. Many of his Masses in natali episcoporum have nothing at all to do with that anniversary, and are really Masses for Sundays after Pentecost; in the middle of a Mass of St Cornelius and St Cyprian he has put the preface of a Mass of St Euphemia, a Mass for the new civil year is inserted among those for martyrs; Masses for St Stephen's day (26 December) with evident allusions to Christmas are put in August, obviously through a confusion with the feast of the finding of his relics (3 August). That the collection is Roman is obvious. It is full of local allusions to Rome. For instance, one of the collects to be said by a bishop on the anniversary of his consecration could only be used by the pope of Rome: "Lord God ... who, although Thou dost not cease to enrich with many gifts Thy Church spread throughout the world, nevertheless dost look more favourably upon the see of Thy blessed Apostle Peter, as Thou hast desired that it should be most exalted, etc." The Preface for St John and St Paul remembers that they are buried