Thus the Gelasian Decree includes the works of Eusebius, Tertullian and Clement of Alexandria, under this designation.
They were, however, published separately long before the Gelasian Decree (496).
These are mentioned in the Gelasian decree.
The Roman books are silent, and there is no mention of it in the collection known as the Leonine Sacramentary; while in the so-called Gelasian Massbook, which, as we have it, is full of Gallican additions made to St Gregory's reform, there is the same silence, though in one MS. of the 10th century given by Muratori we find a form for the ordination of an acolyte.
The collects of the Breviary are largely drawn from the Gelasian and other Sacramentaries, and they are used to sum up the dominant idea of the festival in connexion with which they happen to be used.