Autograph postcard signed from the Polish composer and conductor to Tore Johansen, thanking him for his letter and adding, "To answer your question about my favorite piece: this one I have not yet composed." Image on verso shows a view of Wawel Castle in Kraków. Warsaw, 16 June 1967. Fine. 5.75 x 4 inches (14.7 x 10.4 cm).