After the failure of the opera, the Marquise de Montesson, morganatic wife of the Duc d'Orléans, realized her ambition to engage Saint-Georges as music director of her fashionable private theater. He was glad to gain a position that entitled him to an apartment in the ducal mansion on the Chaussée d'Antin. After Mozart's mother died in Paris, the composer was allowed to stay at the mansion for a period with Melchior Grimm, who, as personal secretary of the Duke, lived in the mansion. The fact that Mozart lived for more than two months under the same roof with Saint-Georges confirms that they knew each other. The Duc d'Orléans appointed Saint-Georges as "Lieutenant de la chasse" of his vast hunting grounds at Raincy, with an additional salary of 2000 Livres a year. "Saint-Georges the mulatto so strong, so adroit, was one of the hunters..."