H. P. K. Skipton. John Hoppner. London, 1905, pp. 44–45, 167, dates the picture 1787 and finds the likeness exact; points out that "Hoppner had effective knowledge of the art of self-defense"; notes that he also painted Wilson Braddyll's wife.
William McKay and W[illiam]. Roberts. John Hoppner, R.A. London, 1909, pp. 130–31.
John Gilbert Bohun Lynch. The Prize Ring. London, 1925, page facing pl. ix.
Paul Magriel. "Portraits of the Fancy." Apollo 50 (November 1949), p. 139.
"Collectors' Questions: Portrait of a Boxer." Country Life 109 (May 4, 1951), p. 1364, ill.
Daniel Mendoza. The Memoirs of the Life of Daniel Mendoza. London, 1951, fig. 11 (Young mezzotint).
Theodore Allen Heinrich in The Frederick W. Schumacher Collection. Columbus, 1976, p. 71, observes that the artist attained originality "outside the conventions of society . . . with the remarkable portrait of the prize-fighter Humphreys".
John Wilson. "The Romantics, 1790–1830." The British Portrait, 1660–1960. Woodbridge, England, 1991, pp. 253–54, pl. 244, notes that by its size and date it is unique, remarks on the sitter's undress, suggests that "for all practical purposes it should be discussed in the same context as a Stubbs portrait of a duke's racehorse"; finds that figure and landscape prefigure the romantic notion of man against nature.
John Human Wilson. "The Life and Work of John Hoppner (1758–1810)." PhD diss., Courtauld Institute of Art, London, 1992, vol. 1, pp. 150–51; vol. 2, fig. 23.
Katharine Baetjer. "British Portraits in The Metropolitan Museum of Art." Metropolitan Museum of Art Bulletin 57 (Summer 1999), pp. 2, 50–52, ill. (color).
Katharine Baetjer in The Metropolitan Museum of Art, New York: Chefs-d'œuvre de la peinture européenne. Exh. cat., Fondation Pierre Gianadda. Martigny, 2006, pp. 124–26, no. 21, ill. (color) [Catalan ed., Barcelona, 2006, pp. 72–73, no. 17, ill. (color)].
Katharine Baetjer. British Paintings in The Metropolitan Museum of Art, 1575–1875. New York, 2009, pp. 180–82, no. 89, ill. (color).
Malcolm Warner. "Books: British Paintings in the Metropolitan Museum of Art." Burlington Magazine 153 (April 2011), p. 257, fig. 55 (color), reviews Ref. Baetjer 2009.