Most esteemed friend,
Although I dare scarcely hope that you can act upon it, I hasten to let you know that Tannhäuser is announced for performance here on Sunday next, September 24th.
On Friday, 22nd, there will be a jubilee concert of our orchestra in celebration of its existence for three hundred years, and on that occasion a piece of my latest opera, Lohengrin, will, amongst other things, be heard. According to a previous arrangement, I consider it my duty to let you know this, and should certainly be very glad to welcome you, and perhaps Princess Wittgenstein (to whom please give my best compliments), on these occasions, although I must fear that my news may come at an inconvenient moment.
Source: Project Gutenberg eBook #3835, Correspondence of Wagner and Liszt — Volume 1, No. 9