[Violinist] Vieuxtemps, Henri. (1820-1881) Autograph Letter regarding his student Graff, the Devil's Trill and other mattersAutograph letter from the great violinist to a good friend ("cher et vnr ami"). Avignon, 25 February, 1867. 4 pp. In French, thanking his friend for the organization of his "petite sance," speaking of his student Graff and of Messrs. Aubert and Taufenberger, indicating that he had chosen Graff for his second violin and making clear that this has caused some tentions ("je suis froiss de la prtention Auberts"). He continues at length on these matters,