See biography by H. F. Hutchison (1971); J. C. Davies, Baronial Opposition to Edward II (1918, repr. 1967); T. F. Tout, The Place of the Reign of Edward II in English History (2d ed. rev. by H. Johnstone, 1937); H. Johnstone, Edward of Carnarvon, 1284–1307 (1947).
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