Elzevir Press -- Descartes (René): Meditationes de Prima Philosophia, quibus Dei existentia, & animae humanae à corpore distinctio, demonstratur, Amsterdam, apud Ludovicum Elzevirium, 1642, 2 vols. in one, 12mo, second edition, publisher's device on title (title damaged at margins, occasional waterstaining, H10 soiled on verso, some creasing of corners), contemporary vellum (loose in binding) [Not in Willems] -- Bacon (Francis): Scripta in Naturali et Universali Philosophia, Amsterdam, apud Ludovicum Elzevirium, 1653, 12mo, engraved title, folding letterpress table, title and earlier leaves heavily waterstained), contemporary vellum (spine internally broken). [Willems 1157: 'Recueil de divers opuscules et fragments latins trouvés dans les papiers de Bacon, et publiés ici pour la première fois par les soins d'Isaac Gruter'; Gibson 223: 'An important collection of Bacon's minor writings'] (2)