Roger, James C. 1859. “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):317-31. https://doi.org/10.9750/PSAS.002.317.331.