WAGNER, Richard (1813-1883). Autograph letter signed ("Richard Wagner"), in French, to Mr. Anderson. Zurich, 12 December 1857. 1 1/2 pages, 4to, written on recto and verso of a bifolium, a few minor stains, creased at folds, docketed by recipient on verso of blank integral leaf, some loss from seal not affecting text. Wagner promises the conductor of the Queen's private band the score for a concert at the Royal Court, but regrets that he can only send the choral parts, as he no longer has the orchestral score.