[...] I have been expecting news from Karlsruhe every day and meant to await information, but it seems they cannot make up their minds to anything there. I have quite lost all desire to conduct Lohengrin. I answered Devrient's last silly report very shortly and, if the Grand Duke wishes it, I am prepared to tell him the naked truth about Devrient's management. On the other hand, I have proposed to the Grand Duke that he should arrange a big concert performance—like that in Zurich—at which I would treat them to extracts from my latest works. [...]
Source: Letters of Richard Wagner, Vol. 2, selected and ed. Wilhelm Altmann, trans. M. M. Bozman (J. M. Dent & Sons, 1927), No. 528