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openlibrary.org
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"Remembering a King". Reading Museum. Reading Borough Council. 5 July 2018. Retrieved 5 December 2018.
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Green 2009, pp. 15, 319; Hollister & Baldwin 1978, pp. 867–868 Green, Judith (2009). Henry I: King of England and Duke of Normandy. Cambridge, UK: Cambridge University Press. ISBN978-0-5217-4452-2. Hollister, C. Warren; Baldwin, John W. (1978). "The Rise of Administrative Kingship: Henry I and Philip Augustus". The American Historical Review. 83 (4): 867–805. doi:10.2307/1867650. ISSN0002-8762. JSTOR1867650.
Thompson 2003, p. 130; White 1949, pp. 105–121 Thompson, Kathleen (2003). "Affairs of State: the Illegitimate Children of Henry I". Journal of Medieval History. 29 (2): 129–151. doi:10.1016/S0304-4181(03)00015-0. ISSN0304-4181. S2CID144398531. White, Geoffrey H. (1949). "Appendix D: Henry I's Illegitimate Children". In White, Geoffrey H. (ed.). The Complete Peerage. Vol. 11. London: St. Catherine Press. pp. 105–120. OCLC568761046.