"In October of 1948, just after I moved to Florence to head the Teatro Comunale, Serafin called me from Rome. "Come at once," he begged. "You must hear this girl. She is discouraged and has bought a ticket to return to America. Help me convince her to stay." So, at his home, I met Maria Callas. She was tall and heavy, but had an interesting face, real presence, expression, intelligence. With Serafin at the piano, she did her usual repertory for me — Gioconda, Turandot, Aida, Tristan. Parts of the voice were beautiful, other empty, and she used strange portamenti. During a pause, she said she had studied with Elvira de Hidalgo, which struck me as curious, for de Hidalgo had been a coloratura. "I know coloratura pieces too," Callas explained, "but I'm a dramatic soprano." "Well," I asked, "can we hear something of a different nature?" So she sang the aria from I Puritani, with the cabaletta. I was overwhelmed, and tears streamed down Serafin's cheeks. This was the kind of singer one read about in books from the nineteenth century — a real dramatic coloratura."