About her teacher, Elvira De Hidalgo

In 1968, Callas told Lord Harewood:

"De Hildalgo had the real great training, maybe even the last real training of the real bel canto . As a young girl—thirteen years old—I was immediately thrown into her arms, meaning that I learned the secrets, the ways of this bel canto, which of course as you well know, is not just beautiful singing. It is a very hard training. You have to learn to read, to write, to form your sentences, how far you can go, fall, hurt yourself, put yourself back on your feet continuously. De Hidalgo had one method, which was the real bel canto way."