[1] He was born on 3 March 1800 in Évreux, son of François-Denis-Hyacinthe Daviel, advocate, and Hortense Delaroche.
He was granted a medal worth 300 francs by the Rouen Academy in 1823 for a thesis on the administration of the dukes of Normandy.
On 3 September 1830 Jacques-Charles Dupont de l'Eure, the Minister of Justice, appointed him first Advocate General of Rouen.
Opposed to the reactionary position of Moyne, appointed procureur général in 1832, Daviel resigned and went back to the bar in Rouen.
[2] On 1 November 1851 Daviel was made keeper of the seals and Minister of Justice in place of Eugène Corbin, who had refused the appointment.