Dearest Richard,
Before the 18th inst. I cannot get away from here; the centenary celebration of Jena University will take place on the 15th, 16th, and 17th, and I have promised to take part in it. Apart from this, I expect in a few days a visit, which is of importance to me. It was my intention to see you at the beginning of September, but I will gladly undertake the journey a few weeks sooner. You on your part must delay your journey by a fortnight, and write to me by return whether I shall find you at Zurich on the 20th instant. I should, of course, not make this journey unless I could be certain of being a few days with you. Trips of pleasure or recreation are not my affair any longer, and I could not consent to one. On the other hand, I shall be genuinely pleased to see you again.
Franz Liszt
Source: Project Gutenberg eBook #4234, Correspondence of Wagner and Liszt — Volume 2, No. 264