He served in the Army as aide-de-camp to General Achard, and went to the campaign in Algiers in 1830.
In 1157 the cathedral chapter of Séez, composed of canons regular, elected Achard as their bishop, and the choice was duly confirmed by Pope Adrian IV.
Jean Luc Achard - researcher at the Centre national de la recherche scientifique (CNRS) in Paris and editor of the Revue d'Etudes Tibétaines