“Some Shetland Brochs and Standing Stones: (Being the Chalmers-Jervise Prize Essay for the Year 1911)”. Proceedings of the Society of Antiquaries of Scotland 46 (November 30, 1912): 94–132. Accessed December 15, 2025. https://journals.socantscot.org/index.php/psas/article/view/7247.