Hall, Derek, W J Lindsay, D H Caldwell, P J Davey, G W I Hodgson, and C Smith. “Excavations at Scalloway Castle, 1979 and 1980”. Proceedings of the Society of Antiquaries of Scotland 113 (November 30, 1984): 554–593. Accessed November 22, 2024. https://journals.socantscot.org/index.php/psas/article/view/9137.