I want to know the answer to the following question:
When did his sister come to stay with Chopin?
All the background I'm provided with is that "After 15 October, when his condition took a marked turn for the worse, only a handful of his closest friends remained with him, although Viardot remarked sardonically that "all the grand Parisian ladies considered it de rigueur to faint in his room."". Is that enough to answer the question?
Answer: no