Cash, C G. “Archaeological Gleanings from Aberfeldy, With Notices of Iron ’Yetts’ at Grantully, Stirling, and Edinburgh”. Proceedings of the Society of Antiquaries of Scotland 45 (November 30, 1911): 386–397. Accessed April 29, 2024. https://journals.socantscot.org/index.php/psas/article/view/7223.