ALS in Italian, one page both sides, 5.25 x 4.25, Reale Accademia d'Italia letterhead, September 23, 1931. Letter to Italian composer Umberto Giordano, his colleague at the Royal Academy of Italy. He thanks him for his invitation to an important concert at the Teatro Reale dell'Opera, but says that he will not be in Rome on that day. In fine condition. Accompanied by the original mailing envelope addressed in Marconi's hand, and by a full letter of authenticity from PSA/DNA.Format: ALS