And Leopold von Toskana, ihr Briefwechsel (2 vols., 1872); Briefe der Kaiserin Maria Theresa an ihre Kinder and Freunde (4 vols., 1881); Marie Antoinette: Correspondance secrete entre Marie-Therese et le comte de Mercy-Argenteau (3 vols., Paris, 1875), in collaboration with Auguste Geffroy; Graf Philipp Cobenzl and seine Memoiren (1885); Correspondance secrete du comte de Mercy-Argenteau avec l'empereur Joseph II.
In vain did the Austrian envoy, Cobenzl, resist the cession of the Ionian Isles to France; in vain did the Directors intervene in the middle of September with an express order that Venice must not be ceded to Austria, but must, along with Friuli, be included.
In the Cisalpine Republic. To the subtle tenacity of Cobenzl he opposed a masterful violence: he checkmated the Directors, when they sought to thwart him in this and in other directions, by sending in once more his resignation with a letter in which he accused them of "horrible ingratitude."
Cobenzl, the Austrian minister at St Petersburg, writing to his court immediately after the reception of the tidings at the Russian capital, describes the empress as full of consternation at the idea that Poland under an hereditary dynasty might once more become a considerable power.
Fournier, Gentz and Cobenzl: Gesch.