Messiaen, Olivier. (1908–1992) Autograph Letter re "majestic interpretation" of Alexander BorovskyAutograph letter signed "Olivier Messiaen" from the important twentieth century composer, a sort of endorsement of the playing of the Russian American pianist, Alexander Borovsky. 1 page, no place, no date. Translated in full: "Having heard in Paris of the majestic interpretation that Alexander Borovsky performed of my Prludes "Le nombre lger, "Les sons impalpables," I have known that he also performed in New York two fragments of my most major work