“ His ability as a military engineer was recognized in the campaigns of 1792 and 1793. In the following year he won distinction in various actions and was promoted successively chef de bataillon and colonel. He was chief of engineers at the siege of Mainz in 1796, after which he was sent to Italy. He there conducted the first siege of Mantua, and reconnoitred the positions and lines of advance of the army of Bonaparte. He was promoted general of brigade before the close of the campaign, and was subsequently employed in fortifying the new Rhine frontier of France. ”

“ He refused to join Napoleon in the Hundred Days, but after the second Restoration he voted in the chamber of peers against the condemnation of Marshal Ney. In politics he belonged to the constitutional party. The king created him a marquis. ”