L'incoronazione di Poppea
He toured the United States in 1937 and 1938 with the Salzburg International Opera Guild, conducting "Cosi fan tutte", "L'incoronazione di Poppea" and "La Cambiale di Matrimonio". While in America he also made his New York concert debut with the NBC Symphony Orchestra and conducted the premiere of Menotti's The Old Maid and the Thief in 1939.