Volume I:            Inventarium. a⁸ b-g⁶⋅⁸. 49 leaves (of 50, lacking a1 title). Grüninger type I*:180G, 13:80G.

Prima Pars. a⁸ b–i⁸⋅⁶ k⁶ l–o⁸⋅⁶ p⁶ q–y aa–cc⁸⋅⁶ dd⁶ ee⁸ ff⁶ gg⁶ hh⁸ ii⁶ kkll⁸. 228 leaves (of 230, lacking a1 title, ll8 blank). Grüninger Typ. 1*:180G, 8:81G, 13:80G, 35:64G, Flach Typ 1:175G, 5:80G. With an inserted altered title from an early 16th-century Gerson edition with text overslips tipped in at front.

Volume II:           Secunda Pars. A¹⁰ B⁸ C–O⁸⋅⁶ P–S⁶⋅⁸ T U⁶ X⁸ Y Z⁶ AA–PP⁶⋅⁸ QQ–SS⁶. 285 leaves (of 286, lacking A1 title, SS6 blank). Grüninger type 1*:180G, 8:81G, 13:80G. With an inserted altered title from an early 16th-century Gerson edition.

Volume III:         Tertia Pars. aa–mm⁸⋅⁶ nn⁸ oo–rr⁸⋅⁶ sstt⁸ vvxx⁶ yyzz Aa–Zz ab ac ad⁸⋅⁶ ae af⁸. 298 leaves (of 300, lacking aa1 title, af8 blank). Grüninger type 1*:180G, 8:81G, 13:80G, 35:64G, Prüss Typ. 7:156G, 8:80G.

Volume IV:         aa-bb⁶ a-c⁶ d⁸ e⁶ f⁸ g-h⁶ i⁸ k⁶ l⁸ m⁶ n-o⁸ p⁶ q-s⁸ t-v⁶ x-y⁸ z⁶ A⁸ B⁶ C-F⁸ G-H⁶ I⁸ K⁶ L-M⁸ N-O⁶ P⁸ Q-R⁶ S-T⁸. 305 (of 308 lacking aa1 title, bb6 blank, T8 blank). Gothic type.

Together, 4 volumes, folio (275 x 192 mm). Initials in red throughout, some flourished, paragraph marks and capital strokes in red. (Occasional scattered mostly marginal wormholes except in Vol. IV, soiling, spotting, occasional browning to some leaves, a few old paper marginal repairs in vol. IV.) 18th-century Continental calf gilt (a few repairs, a little wear to joints and spine ends, some rubbing).  Provenance: Jean-Baptiste Marduel (1742-1848), Lyonnaise bibliophile (signatures on pastedowns Vols. I-III); Saint-Michel (Jesuit library stamps in vols. III and IV).

Second complete edition of the 'Opera' and the first edition published by Grüninger. This is the complete edition of Johannes Gerson's main work with all four parts and inventory in four volumes. Gerson's work in this completeness is extremely rare. The fourth part was not published until 1502. The inserted title-pages in vols. I & II are apparently from 16th-century editions of Gerson’s works.  The title-page inserted in vol. I was used by Johannes Knoblouch for 1514 and 1516 editions of Gerson’s Opera, and was printed by Hans Wechtlin after Hans Baldung Grien.  The title-page inserted in vol. II was used by Johannes Knoblouch for a 1514 edition of Gerson’s Prima pars operum, and was printed by Hans Wechtlin after Hans Baldung Grien (see Hollstein 259). Both inserted titles include a large woodcut depicting Gerson as a pilgrim on verso.  Goff G186; HC 7622*; Bod-inc G-086; BMC I, 170; BSB-Ink G-183; Döring-Fuchs G-78, [G-79]; GW 10714.