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Please see Darrell Wolcott; Constans I and his A.D. 343 Visit to Britain; http://www.ancientwalesstudies.org/id131.html. (Steven Ferry, February 16, 2020.)
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Caer Uisc, Dumnonia, Britain
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Kingdom of Dumnonia, now Devon and Cornwall, and parts of Somerset and Dorset, England (United Kingdom)
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