CHT237205 Frontispiece of \'Elemens de la Philosophie de Neuton\' by Voltaire (1694-1778) published in Amsterdam, 1738 (engraving) (b/w photo) by Dutch School, (18th century); Private Collection; (add.info.: Voltaire writing at his desk below Isaac Newton (1642-1727) and the author\'s lover and collaborator, Madame du Chatelet as Minerva;); 穢 Archives Charmet; Dutch, out of copyright.