[...] Yesterday, after sitting up till about half-past two in the morning, I finished what remained of my new composition for Tannhäuser; the same day I found it necessary to make another alteration in the Song Tournament, for which I need a clear head. Every morning and on four evenings in the week—rehearsals, and moreover, the old story, I have to see to any and every accessory myself. At 11 o'clock this morning a rehearsal with horns for the hunting music—impossible to get them anywhere in Paris, but at last achieved by inconceivable personal exertions. This horrible lumbering of a wagon with innumerable wheels and no driver! I have to be everywhere. For much, nay everything, is really new to these people. [...]
Source: Letters of Richard Wagner, Vol. 2, selected and ed. Wilhelm Altmann, trans. M. M. Bozman (J. M. Dent & Sons, 1927), No. 482