From 8-year old Hilda’s diary:

Suzanne came to see us this morning and stayed for coffee and ate lots of coffee cake. She was so happy. It seems the principal dancer in her ballet company died last night and now she is going to have her part in the new ballet and be the “Prima Ballerina.”

So far I have been unable to find information about Suzanne or the ballet company she was in. Perhaps someday the answer will make itself known!