"Louis XV Signed Letter to Colonel Lieutenant of the Royal Infantry Regiment - Assignment Jean-Sebastien Du Menon Champfleur as a Lieutenant 
in the Company of Duchamp of His Royal Infantry Regiment" 
Countersigned in Versailles on 18 April 1758 by Louis Hyacinthe Cremlis Boyer, Assistant to the Minister of War under the Marshal de Belle-Isle
Size: 15" x 9.4" (38 cm x 24 cm)
"To Monseigneur de Pusignieu Colonel Lieutenant of My Royal Infantry Regiment and in his absence to those in command of the Duchamp Company"
The Régiment Royal, was raised by the Duc d'Arpajon according to a commission issued on January 20 1656.
The King was the colonel of the regiment. However, the colonel-lieutenant was the real commander. During the Seven Years' War, the regiment ranked 13th and the colonel-lieutenants of
the regiment were:
§  October 29 1746: Louis Félicien de
Boffin-Argenson, Marquis de Pusignieu (Maréchal de camp in March 1759)
§  February 10 1759: Charles Claude François, Marquis du Tillet
BOFFIN d'ARGENSON (Louis Félicien de), Marquis de PUSIGNIEU (1716 - March 23, 1778 Grenoble). Colonel Lieutenant of the Royal Infantry regiment, from October 29, 1746 to February 10, 1759, 
spent in Minorca with the regiment from 1756; commander of Port-Mahon (July 23, 1756); field marshal (February 10, 1759); lieutenant general of the King's armies (July 25, 1762); Commander of Saint-Louis (1773).  
Louis Hyacinthe Crémilles (Boyer de) (1700-1768) Lieutenant general of police, assistant to the Minister of War under Marshal de Belle-Isle.‎ 
He directed almost all the operations of the Army of Flanders under the Marshal of Saxe. The capture of Maestricht (1748) earned him the rank of lieutenant general.