Once more, dearest Franz, I must make a complaint about the Faust overture. The Härtels have sent me an abominable arrangement for four hands, of which I cannot possibly approve. Did not you tell them that B., who, I believe, had already made a beginning, would best be able to make this arrangement? Klindworth also would be prepared for it. In any case it should be a pianist of that type. The actual arrangement, which I yesterday returned to the Härtels through a music-seller, must not appear.
However, some wrong notes in this arrangement have drawn my attention to the fact that very probably there are many errors in the score as well. You will remember that it was a copy which I sent to you for your own use, asking you to correct such errors as might occur in your mind, or else to have them corrected, because it would be tedious for me to revise the copy. For the same reason I urgently requested the Härtels, if they printed the score, to send me a proof. You are in frequent communication with the Härtels, and the edition of this overture is really your doing. Be not angry therefore if I ask you to set the matter completely right when convenient. For heaven's sake, forgive me for troubling you with this trifle. The day after tomorrow I have my sixth concert, and a month afterwards I start for home.
Shall I hear from you soon?
A thousand greetings.
Source: Project Gutenberg eBook #4234, Correspondence of Wagner and Liszt — Volume 2, No. 188