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Caesar, Julius. The Gallic Wars. Translated by W.A. McDevitte and W.S. Bohn. Last updated 2009. http://classics.mit.edu/Caesar/gallic.html.
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Giles, J.A. Old English chronicles: including Ethelwerd’s chronicle, Asser’s Life of Alfred, Geoffrey of Monmouth’s British history, Gildas, Nennius, together with the spurious Chronicle of Richard of Cirencester. London: George Bell and Sons, 1906. https://archive.org/details/oldenglishchroni00gileuoft/page/n23/mode/2up.
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Secondary Sources
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Constable, Giles. “From Church History to Religious Culture: The Study of Medieval Religious Life and Spirituality.” In European Religious Cultures: Essays Offered to Christopher Brooke on the occasion of his eightieth birthday, edited by Miri Rubin, 3-16. London: University of London, Institute of Historical Research, 2020.
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Hudson, Alison. “Religion in the Anglo-Saxon Kingdoms,” Anglo-Saxons, British Library. Accessed November 29, 2020. https://www.bl.uk/anglo-saxons/articles/religion-in-anglo-saxon-kingdoms.
Kendrick, T.D. Druids and Druidism. New York: Dover Publications Inc, 2003.
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Webster, Jane. “At the End of the World: Druidic and Other Revitalization Movements in Post-Conquest Gaul and Britain.” Britannia vol. 30 (1999): 1-20. https://www.jstor.org/stable/526671.