§ 1.  Renunciation.  We have seen that Cyril’s last Catechetical Lecture was delivered in the early dawn of the Great Sabbath, Easter Eve.  The additional instructions then promised Cat. xviii. § 32, concerning the behaviour of the Candidates were given on the same day, probably in the evening, when they were all assembled immediately before the administration of Baptism.  The most important parts of the Baptismal ceremony are described by Cyril in the first Mystagogic Lecture, delivered on the Monday of Easter week.  Thus in § 1 he says, Let us now teach you these things exactly, that ye may know the significance of the things done to you on that evening of your Baptism.”