The paper presents an unpublished letter of Liszt to his best student, Sophie Menter, probably dating back to January 16, 1881, and reconstructs the context. In the paper are cited the well-known librarian and musicologist Francesco Florimo, Liberato Aureli, Liszt’s waiter, and Maria Giuli, another pupil of Liszt and niece of Giovanni Pacini, about whom the author has already published unknown documents in this same journal (2013).