But if the veteran hero found some compensation, in the unanimous admiration of foreign nations, for the ingratitude with which he had been treated by the government of his own, he was soon destined to find that gratitude for past services was not to be looked for among foreign nations any more than his own countrymen. Upon the restoration of the Elector, by the treaty of Rastadt, the principality of Mendleheim, which had been bestowed upon Marlborough after the battle of Blenheim by the Emperor Joseph, was resumed by the Elector. No stipulation in his favour was made either by the British government or the Imperial court, and therefore the estate, which yielded a clear revenue of £2000 a-year, was lost to Marlborough. He transmitted, through Prince Eugene, a memorial to the Emperor, claiming an indemnity for his loss; but though it was earnestly supported by that generous prince, yet being unaided by any efforts on the part of the English ministry, it was allowed to fall asleep. An indemnity was often promised, even by the Emperor in writing,[30] but performance of the promise was always evaded. The Duke was made a prince of the Holy Roman Empire, but obtained nothing but empty honours for his services; and at this moment, these high-sounding titles are all that remain in the Marlborough family to testify the gratitude of the Cæsars to the hero who saved their Imperial and Royal thrones.[31] [30] "At the future congress, his Imperial Majesty will do all that is possible to sustain my Lord Duke in the principality of Mendleheim, but if it should so happen that any invincible difficulty should occur in that affair, his Imperial Highness will give his Highness an equivalent out of his own hereditary dominions."--_Emperor Charles VI. to Duchess of Marlborough_, August 8, 1712.--Coxe, vi. 248. [31] Coxe, vi. 249, 251.