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^Cylchgrawn Hanes Cymru. University of Wales Press. 1992. p. 169.
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^Edward Breese (1873). Kalendars of Gwynedd; or, Chronological lists of lords-lieutenant [&c.] ... for the counties of Anglesey, Caernarvon, and Merioneth. p. 29.
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^Jonathan Williams (1859). The History of Radnorshire. R. Mason. p. 115.
^John McClintock; James Strong (1981). Cyclopedia of Biblical, Theological, and Ecclesiastical Literature. Baker Book House. p. 324.
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^The Apostolical Succession in the Church of England. James Parkes and Company. 1866. p. 15.
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^Lynch, Jack (2011). Samuel Johnson in context. Cambridge New York: Cambridge University Press. p. 320. ISBN9780521190107.
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This article incorporates text from a publication now in the public domain: "Ewer, John". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
