The police were alerted by an anonymous letter and found her in a horrific state.
Blanche was immediately taken to a hospital, and her mother and brother were arrested for their part in her long-term imprisonment.
Article on the full story: https://historicflix.com/the-tragic-story-of-blanche-monnier-locked-away-from-society-for-25-years/
This is one of those stories that haunts you for years after you read about it….