Hutcheson, Alexander. “Notice of a Cup and Ring-Marked Stone, and of Incised Stones Recently Discovered at Cargill, and of an Incised Boulder at Fowlis Wester”. Proceedings of the Society of Antiquaries of Scotland 18 (November 30, 1884): 313–318. Accessed November 22, 2024. https://journals.socantscot.org/index.php/psas/article/view/6111.