In 1814 he had published a work, De la constitution francaise de l'an 1814, in which he commented on the Charter from a Liberal point of view, and this reached its fourth edition in 1819.
Then, from July to October, he was in Paris superintending the publication of his first work: Cadastre perpetuel, dedie a l'assemblee nationale, l'an 1789 et le premier de la liberte francaise, which was written in 1787 and issued in 1790.
Fenelon is the author of a number of writings, among which those of general importance are Memoires touchant l'Angleterre et la Suisse, ou Sommaire de la negociation faite en Angleterre, l'an 1571 (containing a number of the letters of Charles and his mother, relating to Queen Elizabeth, Queen Mary and the Bartholomew massacre), published in the Memoires of Castelnau (Paris, 1659) Ne'gociations de la Mothe Fenelon et de Michel, sieur de Mauvissiere, en Angleterre; and Depeches de M.
In this capacity he made a sensation by his L'Etat de la France a la fin de l'an VIII (1800), which he had been commissioned by Bonaparte to draw up, as a manifesto to foreign nations, after the coup d'Nat of the 18th Brumaire.
The first of these was Ober den Unsprung andCharakterdesKrieges gegen die franzosische Revolution (1801), by many regarded as Gentz's masterpiece; another important brochure, Von dem politischen Zustande von Europa vor and nach der Revolution, a criticism of Hauterive's De l'etat de la France a la fin de l'an VIII, appeared the same year.