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6Allcroft, A. H. The Circle and the Cross a Study in Continuity. London: Macmillan, 1927. 15-16.
7Wood-Martin, W. G. Pagan Ireland an Archæological Sketch; a Handbook of Irish Pre-Christian Antiquities. London: Longmans, Green, 1895. 263.
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10Gregory 277.
11Hawkes, Jacquetta. A Guide to the Prehistoric and Roman Monuments in England and Wales. London: Chatto and Windus, 1976. 48.
12Robinson, Tim. "Twilight on Old Stones." Field Day Review 3 (2007): 50-51.