Born in Paris, he was educated at the Louis-le-Grand and Bourbon colleges in his native city, and won high honours at his public examination.
At this time he seemed destined for a political career, and after the revolution of 24 February 1848 was elected to the National Assembly; but close contact with revolutionary men and ideas cooled his old ardour.
After the coup d'état he resigned his position as director of the manuscript department of the Bibliothèque Nationale, to which he had been appointed in 1848, and refused to accept an administrative post until after the fall of the empire.
Among his other works were the remarkable Histoire de la philosophie scolastique (1872–1880); Les Mélanges poétiques d'Hildebert de Lavardin (1852); an edition of the Works of Hugh of St Victor (1886); a critical study of the Latin poems attributed to St Bernard (1870); and Bernard Délicieux et l'Inquisition albigeoise (1877).
From the time of his appointment to the Bibliothèque Nationale up to the last days of his life he was engaged in making abstracts of all the medieval Latin writings (many anonymous or of doubtful attribution) relating to philosophy, theology, grammar, Canon law, and poetry, carefully noting on cards the first words of each passage.
After his death this index of incipits, arranged alphabetically, was presented to the Académie des Inscriptions et Belles-Lettres, and a copy was placed in the manuscript department of the Bibliothèque Nationale.