A good friend, Rosemary Jourdan the ballerina, now in her 80s remembers Madam Nordi well and very fondly. She took lessons with her in London and on her return to the US joined the American Ballet Theatre.
This is Rosemary dancing in Miss Julie https://www.gettyimages.co.uk/detail/news-photo/american-ballet-theatre-dancer-rosemary-jourdan-in-miss-news-photo/692208689
I see Mme Nordi has this page. https://en.wikipedia.org/wiki/Cleo_Nordi