From this period must be dated that aversion which she never ceased to manifest for the Prince de Rohan.
About the same time the Dauphiness received information of a letter written by Prince Louis to the Duc d'Aiguillon, in which the ambassador expressed himself in very free language respecting the intentions of Maria Theresa with relation to the partition of Poland.

This letter of Prince Louis had been read at the Comtesse du Barry's; the levity of the ambassador's correspondence wounded the feelings and the dignity of the Dauphiness at Versailles, while at Vienna the representations which he made to Maria Theresa against the young Princess terminated in rendering the motives of his incessant complaints suspected by the Empress.
Maria Theresa at length determined on sending her private secretary, Baron de Neni, to Versailles, with directions to observe the conduct of the Dauphiness with attention, and form a just estimate of the opinion of the Court and of Paris with regard to that Princess.

The Baron de Neni, after having devoted sufficient time and intelligence to the subject, undeceived his sovereign as to the exaggerations of the French ambassador; and the Empress had no difficulty in detecting, among the calumnies which he had conveyed to her under the specious excuse of anxiety for her august daughter, proofs of the enmity of a, party which had never approved of the alliance of the House of Bourbon with her own.
At this period the Dauphiness, though unable to obtain any influence over the heart of her husband, dreading Louis XV., and justly mistrusting everything connected with Madame du Barry and the Duc d'Aiguillon, had not deserved the slightest reproach for that sort of levity which hatred and her misfortunes afterwards construed into crime.

The Empress, convinced of the innocence of Marie Antoinette, directed the Baron de Neni to solicit the recall of the Prince de Rohan, and to inform the Minister for Foreign Affairs of all the motives which made her require it; but the House of Rohan interposed between its protege and the Austrian envoy, and an evasive answer merely was given.
It was not until two months after the death of Louis XV.

that the Court of Vienna obtained his recall.