Photos-Jones, Effie, B Barrett, and G Christidis. “Stevenson at Vulcano in the Late 19th Century: A Scottish Mining Venture in Southern Europe”. Proceedings of the Society of Antiquaries of Scotland 147 (November 21, 2018): 303–323. Accessed April 30, 2024. https://journals.socantscot.org/index.php/psas/article/view/10115.