 In 1803, he was made a full Colonel, finally retiring from the militia in 1818.He died at his home in Montreal, 1822.In the Legislative Assembly of Lower Canada, Lotbinière was elected Speaker in the 1st Parliament of Lower Canada, having entered with his brother-in-law, Pierre-Amable de Bonne, for the riding of York which took in his seigneuries of Vaudreuil and Rigaud, Quebec.