Folio contemporary calf with six raised bands and handsome gilt compartments.Gilt fore-edges (chipping to head & foot of spine/corners and a some part of edges esp. to lower edge, some scratches to boards). All edges sprinkled red. Half title + Titlepage with 135 x 92mm engraving by P.le Pautre + v-xii [=Preface + contents] +[xiii]-clxii =Dissertationes Praeviae in Irenaei Libros + clxiii -clxxviii =Selecta Veterum Testimonia & Elenchus Librorum et Capitum Operis. +1p + full page engraving of the Prospectis Systematis Valentinianorum. [page i with large engraving of Irenaeus blessing the crowds] by P.F,Giffert. + 2-337pp "Contra Haereses". This part is in three parallel columns with Greek text and two Latin texts. [338 -439pp =Fragmenta +Appendix +variae Lectiones, Greek Glossaries & indeces. +[ 1pp} = Irenaei & Veterum Gnosticorum. Pagination begins again with 1-221pp & Privilege du Roy. Ths final section includes Desiderius Erasmus' Observations & notes on Saint Irenius + a final index. There are side notes as well as larger foot notes almost thoughout. The paper is crisp, clean and well bound in. [NB extra shipping cost for large heavy volume].