Nevertheless he cheerfully gave his voice in 1814 for the dethronement of his patron, and his "suppleness" merited a seat in the chamber of peers, and, in 1817, the dignity of a marquisate.
In 1879 he was appointed French ambassador at Bern, and in 1880 was transferred to London; but he lacked the suppleness and command of temper necessary to a successful diplomatist.
His agility was not less remarkable than his strength; he excelled in all athletic feats which demanded suppleness of limb and quickness of eye.
But Rousseau had not, like Montesquieu, a position which guaranteed him from serious danger; he was not wealthy like Helvetius; he had not the wonderful suppleness and trickiness which even without his wealth would probably have defended Voltaire himself; and he lacked entirely the "bottom" of Freron and Diderot.
There have been many more effective orators, for lack of imaginative suppleness prevented him from penetrating to the inner mind of his hearers; defects in delivery weakened the intrinsic persuasiveness of his reasoning; and he had not that commanding authority of character and personality which has so often been the secret of triumphant eloquence.