However, there was a high risk of Bellatrix freeing herself from the old run-down building it would be hard to keep her locked up in such a place. Hermione's next bright idea had been to return to Grimmauld place for a time and maybe keep Bellatrix in its cellar, like she had done to Hermione back at the Malfoys. This plan was again dismissed by Hermione as she had a feeling Harry would likely want to reclaim his Godfather's home for himself at some point and it just wasn't viable to keep Bellatrix a prisoner there.