DESCARTES, René. Opuscula posthuma, physica et mathematica, Amsterdam: P. & J. Blaeu, 1701, 4°, contemporary calf gilt (later endpapers, some gutter margins with minor dampstains at beginning, early signature on title, head of spine chipped, upper joints a little worn) [Brunet II, 611]; [Opera philosophica editio quarto], Amsterdam, 1664 [and 1658], 4°, engraved portrait frontispiece and engraved title, illustrations (first leaves tape-repaired, some staining, browning and light wormimg), old calf (slightly worn, front hinge cracked); Geometria... cum notis Florimondi de Beaume... opera atque studio Francisci à Schooten, Amsterdam: Elzevier, 1659, volume I only (of 2), 4°, second edition, engraved portrait frontispiece, diagrams (some dampstaining at beginning, light browning and staining throughout), contemporary vellum (some soiling). [Willems 1244] (3)