[MASQUE DE FER] - SAINT-FOIX (Germain-François Poullain de). Réponse de monsieur de Saintfoix au R. P. Griffet, et recueil de tout ce qui a été écrit sur le prisonnier masqué. London, Paris: Ventes, 1770. - In-12, jansenist red morocco, ribbed spine, interior gilt lace, gilt edges (19th century binding). First edition of this response to Henri Griffet's chapter on the masked prisoner in his "Traité des différentes sortes de preuves qui servent à établir la vérité de l'histoire". Saint-Foix was convinced that the man in the iron mask was the Duke of Monmouth. A fine copy in 19th-century morocco. Dark marks on upper spine and boards, not serious.