[...] Tristan is going ahead, and I have nothing to complain of. Still, it will probably drag on till February. Esser is working for me splendidly and is altogether an excellent fellow. [...]
Source: Letters of Richard Wagner, Vol. 2, selected and ed. Wilhelm Altmann, trans. M. M. Bozman (J. M. Dent & Sons, 1927), No. 548