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Roger, J.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, (Nov. 1859), 317–331. DOI:https://doi.org/10.9750/PSAS.002.317.331.