My guess is that
Instit., 27:18 refers to the
Institutiones Ecclesiasticæ.
Pope Benedict XIV
Great as a man, a scholar, an administrator, and a priest, Benedict’s claim to immortality rests principally on his admirable ecclesiastical writings. The most important of them, besides those already mentioned, are: “
Institutiones Ecclesiasticæ”, written in Italian, but translated into Latin by P. Ildephonsus a S. Carolo; it is a collection of 107 documents, principally pastoral letters, letters to bishops and others, independent treatises, instructions, etc., all of which are really scientific dissertations on subjects connected with church law or the care of souls; the classical work “De Synodo Dioecesanâ”, published after his elevation to the papacy, an adaptation to diocesan administration of the general ecclesiastical law; this book is called by Schulte, because of its influence, one of the most important, if not the most important, modern work in canon law; “Casus Conscientiæ de mandato Prosp. Lambertini Archiep. Bonon propositi et resoluti”, valuable for the lawyer as well as the confessor; “Bullarum Benedicti XIV”, which contains the legislation of his pontificate, many of its documents being scientific treatises.
The Catholic Encyclopedia, Volume II
Copyright © 1907 by Robert Appleton Company