Sources:

https://theculturetrip.com/europe/united-kingdom/scotland/articles/the-story-behind-edinburghs-mary-kings-close/

https://www.spookyisles.com/mary-kings-close/

https://www.realmarykingsclose.com/edinburghs-plague-doctor/

https://www.scotsman.com/news-2-15012/murderous-tale-brought-back-to-life-1-875534

https://www.undiscoveredscotland.co.uk/usbiography/r/alisonrough.html

https://digital.nls.uk/learning/scots-plague-buik/plague-in-scotland/

https://www.scotsman.com/lifestyle-2-15039/a-closer-look-at-a-city-legend-1-869987

https://www.realmarykingsclose.com/about-mary-kings-close/fun-facts/

https://www.realmarykingsclose.com/meet-mary-king/

Pictures:

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.realmarykingsclose.com%2Fplan-your-visit%2F&psig=AOvVaw0zvU1AYz8mTNkraWlvgM07&ust=1581367014955000&source=images&cd=vfe&ved=0CAMQjB1qFwoTCLio166pxecCFQAAAAAdAAAAABAa

https://upload.wikimedia.org/wikipedia/commons/b/bd/Edinburgh_City_Chambers.jpg