In the oldest Roman sacramentaries, however, nothing is found relating to the blessing and procession of palms, but the ritual for them is minutely described in the Ordos, xii. c. 9 (of Cencio Savelli), and xv. c. 53 _et seq._ These clearly belong to the Middle Ages. The first trace of the practice of holding palm-branches during divine service, as far as the rituals of the Roman Church are concerned, is found in the later recension of the Gregorian sacramentary used in Gaul in the ninth and tenth centuries. Among the prayers for the day is found one for the blessing, not of the palms, but of those who carried them. In the Gelasian and Gregorian sacramentaries, the Sunday is at any rate called _Dominica in Palmas_, but only in the title. It seems as if people were satisfied at first with holding palms during the Mass, and that the palm procession only took shape later. In the Gotho-Gallican missal, the Sunday has no special name and no mention is made of palms. On the other hand, the name appears in the lectionaries of Silos and Luxeuil. Everything points to the blessing of the palms, and, probably, also the procession, having become customary in the second half of the ninth century.[131] Isidore of Seville[132] is familiar with the name _dies palmarum_, but not with the procession. Amalarius,[133] on the contrary, mentions the custom of carrying palm branches through the church and of shouting Hosanna. There was, however, a rite, universally observed on Palm Sunday, which had reference to the administration of baptism. As is well known, the catechumens in primitive times were instructed in Christian doctrine during Lent, and even for a longer period. The instruction of catechumens and the solemn administration of baptism took place only once a year. The former began eight weeks before Easter, and ended with the baptism which was administered on Easter Eve. The concluding part of this course of instruction was composed of the so-called mystagogical instructions treating of the sacrifice of the Mass, and the three sacraments of baptism, confirmation, and the Holy Eucharist. The words of the Creed, so the _disciplina arcani_ enjoined, were the last, not the first thing to be imparted. The catechumens learnt the Creed for the first time on Palm Sunday. This was the custom in Spain,[134] Gaul,[135] Milan,[136] probably also in Rome. There seems, however, to have been divergences as to the choice of the day, for it was necessary, at any rate in Gaul, to enjoin uniformity, since the Synod of Agde (506) prescribes in its thirteenth canon: In every diocese, the Creed shall be imparted in church to the catechumens on one and the same day, _i.e._ eight days before Easter Sunday. This ceremony was called the _traditio symboli_.