Further success followed in 1732 with his play "Zaïre", which when published in 1733 carried a dedication to Fawkener praising English liberty and commerce. He published his admiring essays on British government, literature, religion and science in "Letters Concerning the English Nation" (London, 1733). In 1734, they were published in Rouen as "Lettres philosophiques", causing a huge scandal. Published without approval of the royal censor, the essays lauded British constitutional monarchy as more developed and more respectful of human rights than its French counterpart, particularly regarding religious tolerance. The book was publicly burnt and banned, and Voltaire was again forced to flee Paris.