Guido Cantelli should have been one of the conducting giants of the 20th century. After emerging as a talent to be watched amid the turmoil of wartime Italy, he was acknowledged as a great conductor following his 1945 debut at La Scala in Milan, and Arturo Toscanini came to refer to Cantelli, more than a generation younger than the celebrated maestro, as his true successor. By the mid-'50s, Cantelli had a successful recording career going with the Philharmonia on EMI Records, and had guest conducted Toscanini's NBC Symphony Orchestra and the New York Philharmonic, as well as n...