"12. Pragae ( Praha ) , Typis Universitatis Carolo-Ferdinandae in Collegio Societatis Jesu ad S.Clementem, 1757, 2 vols in-folio, 29 x 20 cm, (4) +790pp ; (4) + 472 pp + (87)(index) with woodcut & copper engraved vignets (Klauber), uniform old vellum with gilt title on back, marbled edges. With the blind-stamped ex-library mark on the title. Volume one has had waterdamage at the binding resulting in a stained and discoloured binding and a watermarked pastedown and first fly-leaf, interior has no waterstains. Still acceptable set of the internal rules of the Jesuit-Order. These guidelines, for internal use only, are rare and printed in small editions only. This Prague edition divised a classification of rules which subsequently became the generally accepted structure. (De Backer-Sommervogel Tome V col. 82-83)."