VERNE (Jules). L'Île mystérieuse. Paris: Bibliothèque d'éducation et de récréation, J. Hetzel et Cie, [1875-1876]. -In-8 double, 268x178: (2 ff.), 616 pp., (4 ff.). Purple boards with two elephants, gilt edges (Engel). First illustrated edition, with 154 compositions by Léon Benett engraved by Barbant. Copy in violet cartonnage with two elephants, concomitant with that "à la bannière". It is type 2, with the title cartouche featuring a gilded background. It is undoubtedly one of Engel's first attempts at the "two elephants" cartonnage, before he adopted the version with the "positive" cartouche retained by Hetzel. The second board is Engel "a" type. 1875-1876 catalog bound at end. Cartonnage restored and re-tinted.