Anderson, Robert, and David Laing. “Plan of the Remains of the Ancient Chapel-Royal, Called Kirkheugh, St Andrews, With a Descriptive Notice”. Proceedings of the Society of Antiquaries of Scotland 4 (November 30, 1862): 74–86. Accessed April 29, 2024. https://journals.socantscot.org/index.php/psas/article/view/4560.