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4O'Flanagan, Michael. Letters Containing Information Relative to the Antiquities of the County of Mayo. Vol. 18. Bray, 1927. 37, 77-81.

5Allcroft, A. H. The Circle and the Cross a Study in Continuity. Vol. 2. London: Macmillan, 1927. 49-56.

6Allcroft 23.