|"Is this all real? Or has this been happening inside my head?"
The subject of this article is a real-life person, group, company, product, or creative work that has been mentioned "in-universe" in a canon source. The Harry Potter Wiki is written from the perspective that all information presented in canon is true (e.g., Hogwarts really exists), and, as such, details contained in this article may differ from real world facts.
Robert Louis Balfour Stevenson (13 November, 1850 – 3 December, 1894) was a Scottish writer, who authored 13 novels, as well as some collections of poems, essays, and short stories. Stevenson was a literary celebrity during his lifetime.