G. C. Williamson and H. L. D. Engleheart, George Engleheart 1750-1829. Miniature Painter to George III, London, 1902, p. 102.
G. A. Usher, Gwysaney and Owston. A History of the Family of Davies-Cooke of Gwysaney, Flintshire and Owston, West Riding of Yorkshire, Denbigh, 1964, illustrated between pp. 64 and 65.