But in Madame Carvalho's case the opposite was true.

The freshness and purity of her voice were beyond compare, while its smoothness and the harmony of the registers were perfect.

It was a miracle the like of which we shall probably never see again.
But if Duprez made a wonderful voice at the risk of breaking it, I have always thought that Madame Carvalho owed her admirable diction, so distinguishing a mark of her talent, to Delsarte.

Delsarte was a disastrous and deadly teacher of singing.

No voice could stand up under his methods, not even his own, although he attributed its loss to teaching at the Conservatoire.