She was a French woman who lived in Paris, and she believed she was married to Henri Fournaye.
She discovered that her husband was living a double life – he was Eduardo Lucas in London.
She came to visit him at his London house. It was possible that she had murdered Eduardo Lucas
because she was jealous. Holmes did not think she was important because it was not his job
to discover who had killed Lucas. He wanted to save Europe from war by finding the letter.