“Surely, in a building that had 1,942 keys, there were people who knew how to get down to these cellars without the permission of the authorities..."PatreonFurther Reading/Principle Sources:https://www.messynessychic.com/2014/08/26/unmasking-the-parisian-phantom-of-the-opera/https://www.oldstyletales.com/single-post/2018/09/25/The-Phantom-of-the-Opera-Historical-Inspirations-Literary-Analysis-Film-Adaptations----a-Spooky-Spotlight-on-the-Gothic-Novel>