Hi, Alexandra, thank you very much for your reply. Someone had mentioned you above :-D
No, actually, the Alexandra I was looking for is not Alexandra M. David. She must be about 30 years old now, if that helps, perhaps a bit younger.
Now, Helena Sá e Costa was just an unfortunate forgetting. Of course I know her, I even had the change to trade a few words with her so few years ago, when the Fundação Engenheiro António de Almeida create the Suggia prize. She could barely understand me at all, there was a young man always at her side who had to tell her what people were saying. Age can be sad, sometimes.
Alexandre