Passage: In the fall of 1735, Voltaire was visited by Francesco Algarotti, who was preparing a book about Newton in Italian. Partly inspired by the visit, the Marquise translated Newton's Latin Principia into French in full, and it remained the definitive French translation into the 21st century. Both she and Voltaire were also curious about the philosophies of Gottfried Leibniz, a contemporary and rival of Newton. While Voltaire remained a firm Newtonian, the Marquise adopted certain aspects of Leibniz's arguments against Newton. Voltaire's own book Elements of Newton's Philosophy made Newton accessible and understandable to a far greater public, and the Marquise wrote a celebratory review in the Journal des savants. Voltaire's work was instrumental in bringing about general acceptance of Newton's optical and gravitational theories in France.Voltaire and the Marquise also studied history, particularly those persons who had contributed to civilization. Voltaire's second essay in English had been "Essay upon the Civil Wars in France". It was followed by La Henriade, an epic poem on the French King Henri IV, glorifying his attempt to end the Catholic-Protestant massacres with the Edict of Nantes, and by a historical novel on King Charles XII of Sweden. These, along with his Letters on the English mark the beginning of Voltaire's open criticism of intolerance and established religions. Voltaire and the Marquise also explored philosophy, particularly metaphysics, the branch of philosophy that deals with being and with what lies beyond the material realm, such as whether or not there is a God and whether people have souls. Voltaire and the Marquise analyzed the Bible and concluded that much of its content was dubious. Voltaire's critical views on religion are reflected in his belief in separation of church and state and religious freedom, ideas that he had formed after his stay in England.

Question: What was the second essay deemed as?
Essay upon the Civil Wars in France