In this work the directions concerning the instruction of Catechumens and their Baptism are addressed to the Catechist and the Minister of Baptism.  They contain only a short outline (c. xxxix.) of the subjects in which the Catechumens are to be instructed, most if not all of which are explained at large in Cyril’s Lectures:  and in the directions concerning Baptism, Chrism, and the Eucharist, the similarity is so close, that in many passages of the Constitutions the author seems to be referring especially to the use of the Church of Jerusalem.