Smith, John Alexander. “Note of the Discovery of Sepulchral Urns in Fair Isle. With Letter from John Bruce, Esq., Yr. Of Sumburgh, Shetland”. Proceedings of the Society of Antiquaries of Scotland 11 (November 30, 1876): 530–534. Accessed April 24, 2024. https://journals.socantscot.org/index.php/psas/article/view/5766.