Sources:

https://philipmould.com/news/13-who-was-sarah-biffin-the-woman-behind-the-record-breaking-self-portrait.-by-emma/ - Emma Rutherford

http://numberonelondon.net/2018/05/the-amazing-sarah-biffen-artist-extraordinaire/ - Victoria Hinshaw

https://en.wikipedia.org/wiki/Sarah_Biffen

https://www.nationalgalleries.org/art-and-artists/artists/sarah-biffin-mrs-em-wright

https://www.rejectedprincesses.com/princesses/sarah-biffin

"Curious Epitaphs" - Collected and edited by William Andrews

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