[...] I have a moment's leisure in which to remember my friends. I should like to dedicate it to the good Vogls. Therefore may I ask you if you accorded the pair worthy honours on their return to Munich? They have exalted the fame of Munich above all the stars of the German theatrical world. They were the pillars of the daring Berlin venture and it could not have gone through without them. What Vogl has achieved could only be achieved, notwithstanding extraordinary talents, by a man of the greatest spiritual energy. I have come to value him very much. I want to ask you to be very proud of him and of his splendid wife and to show them every kindness in my name. [...]
Source: Letters of Richard Wagner, Vol. 2, selected and ed. Wilhelm Altmann, trans. M. M. Bozman (J. M. Dent & Sons, 1927), No. 724