He was elected member of the Academie des Inscriptions et Belles Lettres in 1859, and became a member of the staff of the Recueil des historiens de la France, collaborating in vols.
There in 1789 he and Dumont allied themselves with Mirabeau, secretly collaborating for him on the Courrier de Provence and also in preparing the speeches which Mirabeau delivered as his own.
Muller, and in 1830 an Exposé de la doctrine Saint-Simonienne, and collaborating in the Saint-Simonian journal Le Producteur.
After a visit to France in 1648 he continued his antiquarian researches in London, collaborating with Richard Dodsworth in his Monasticon Anglicanum, which was published successively in single volumes in 1655, 1664 and 1673.
After studying law at Dijon he went to Paris, where he was called to the bar, and entered into close relations with Gambetta, collaborating with him in 1868 in the foundation of the Revue politique.