Mitchell, Arthur. “Notice of a Polished Stone Axe, and a Well-Shaped Flint Arrow-Head, Found in a Cave in Islay”. Proceedings of the Society of Antiquaries of Scotland 32 (November 30, 1898): 36–39. Accessed April 23, 2024. https://journals.socantscot.org/index.php/psas/article/view/6686.