 Once in Paris, he first published articles of a political cast, and historical tales in the style of the time, such as "Michel Morin et la Ligue"; "Florence ou la Religieuse"; "Le Régicide" and others.He then took up historical writing, his first work of this kind is "Le Concordat entre Léon X et François I" (1821), which is, for the most part, a translation of the Concordat between pope Leo X and renaissance king Francis I of France.This was followed by his "Histoire de la St. Barthélemy" (2 volumes, 1826) on the St. Bartholomew's Day Massacre of 24 August 1572.