Song : favourite one, La Divina : 'O patria mia'

It was yesterday and I could not write a word without the illustration of her voice. I thought about that celebrated high E flat in Act II of Aïda which is the most praised single note among her admirers. It was in 1951 in Mexico. I was a child and was going to Marseille opera house a lot when school was over, following my parents or waiting for them at home while listening to the radio.
Yesterday I looked for this famous 1951 live Aïda, I do not have it, instead I have the 1955 Scala where she does not sing the unwritten high E flat. But is that single note such a thrill in all her splendid renditions of the operas she performed? What I care for is her legato and the pain I can really feel when I play that aria which is with her kind of voice, gloomy at the low range, sometimes not even at ease at the top, almost fragile...so intense always, for ever and ever.
O Patria mia- Maria Callas live from La Scala. Aug 1955; Tulio serafin -Naxos