DESCARTES, René (1596-1650). Discours de la Méthode, Paris: Henry le Gras, 1658, 4° (196 x 143mm.), second edition, vignette to title, woodcut illustrations, some full-page (occasional light spotting, else good and clean), contemporary mottled calf (rebacked, original spine preserved and laid down, corners restored, slight wear to extremities), sprinkled edges. [Guibert 17].