Roger, James C. “Notices of Sculptured Fragments, Formerly in the Episcopal Palace, Glasgow; Also, Notice of a Sarcophagus Found Within the Choir of the Cathedral, Supposed to Have Contained the Remains of Archbishop Dunbar”. Proceedings of the Society of Antiquaries of Scotland 2 (November 30, 1859): 317–331. Accessed May 5, 2024. https://journals.socantscot.org/index.php/psas/article/view/4440.