Ceremonies. Actually baptismal exorcism is earlier than S. Gregory. From the very first catechumens were exorcised as a preparation for the Sacrament of Baptism. In this connexion exorcism is a symbolical anticipation of one of the chief effects of the Sacrament of Regeneration, and since it was used in the case of children who had no personal sins, S. Augustine, writing against the Pelagians, appeals to it as clearly implying the doctrine of original sin. S. Cyril of Jerusalem in his Catecheses, A.D. 347, gives a detailed description of baptismal exorcism, by which it appears that anointing with exorcised oil formed a part of this function in the East. The earliest Western witness which explicitly treads unction as part of the baptismal exorcism is that of the Arabic Canons of Hippolytus.