5. _The Lectionary and Martyrology of Silos_ Since the appointment of special Masses in honour of the saints is a distinguishing feature of the Latin rite, Western liturgical books are in themselves a source from which we can increase our knowledge of the saints’ festivals, the most important in this respect being the sacramentaries, but the other books used at the celebration of Mass, the collections of epistles and gospels especially, also throw light on the subject. In addition to the books of this kind already named, the _Lectionarius_ of Silos has, in recent times, attracted much attention in this connection.[785] It is of the highest importance both for the history of the development of the ecclesiastical year and for the festivals of the saints, for as it belongs to the period preceding the Carolingian liturgical reform, it represents a very ancient rite of which, until its discovery, all trace had disappeared. This rite is not the same as the southern Spanish rite of the Province of Boetica from which the so-called Mozarabic rite is derived, but belongs to the ancient ecclesiastical province of Toledo. The codex in which it is contained was written before the year 1062, for a later event, _i.e._ the translation of St Isidore’s relics from Seville to Leon, is added by a later hand. This codex, originally belonging to the monastery of St Sebastian at Silos and now in the National library of Paris, contains two distinct documents, a lectionary giving the lections from scripture for the whole of the year, and a martyrology; the latter was compiled between 925 and 1000; but the lectionary much earlier. Its antiquity is proved: (1) By the limited numbers of saints’ days; (2) by the circumstance that the catechumenate is still in force; (3) that the Saturdays in Lent are not fast days, agreeing with the eastern custom; (4) the Sundays after Epiphany and Pentecost do not appear as forming part of the ecclesiastical year, and are not even numbered, but, as in the _Gelasianum_, there are added twenty-four Masses called “dominicæ quotidianæ”; (5) there are five Sundays in Advent; (6) with regard to saints’ days, Anastasius the Persian is not yet placed along with St Vincent on the 21st January, and the Apostle James is also omitted along with all reference to the Spanish legend connected with his name. From this it is plain that St James, at the time when this work was compiled enjoyed no special worship in Spain. On these grounds the first editor, G. Morin, regards the lectionary as certainly belonging to 650.