Charles Robert Leslie and Tom Taylor. Life and Times of Sir Joshua Reynolds. London, 1865, vol. 1, pp. 278, 282, 347, 430; vol. 2, pp. 41, 54, list Mrs. Horton among sitters in February 1767 and January 1769, noting that the references are either to Nancy Parsons or to the widowed Mrs. Horton who later married the duke of Cumberland; identify with Nancy Parsons a Mrs. Haughton who sat in January 1773.
Algernon Graves and William Vine Cronin. A History of the Works of Sir Joshua Reynolds P.R.A. Vol. 2, London, 1899, pp. 486, 635, 732.
A Catalogue of Paintings in the Collection of Jules S. Bache. New York, 1929, unpaginated, ill., as painted in 1769; from the collections of Viscount Maynard and Frances, Countess of Warwick.
"The Antiquarian's Picture Gallery." Antiquarian 13 (September 1929), p. 37, ill.
Wilhelm R. Valentiner, ed. Unknown Masterpieces in Public and Private Collections. Vol. 1, London, 1930, no. 92, ill.
August L. Mayer. "Die Sammlung Jules Bache in New-York." Pantheon 6 (December 1930), p. 542.
Hans Tietze. Meisterwerke europäischer Malerei in Amerika. Vienna, 1935, p. 340, pl. 228 [English ed., "Masterpieces of European Painting in America," New York, 1939, p. 325, pl. 228].
A Catalogue of Paintings in the Bache Collection. under revision. New York, 1937, unpaginated, no. 60, ill.
Ellis K. Waterhouse. Reynolds. London, 1941, p. 59, pl. 120, as painted 1767/69.
A Catalogue of Paintings in the Bache Collection. rev. ed. New York, 1943, unpaginated, no. 60, ill.
An American Correspondent. "English Portraits in the Jules Bache Collection." Connoisseur 113 (March 1944), pp. 51, 53, ill.
David Loeffler Smith. "Great Artists as Teachers." American Artist 29 (September 1965), p. 60, ill.
Malcolm Cormack. "The Ledgers of Sir Joshua Reynolds." Walpole Society 42 (1970), pp. 122, 124, 142, on January 19 and after August 27, 1767, Reynolds records payments of £26.5.0 each for a portrait of "Miss Hortoun"; he notes "Mrs. Horton. Con capivi senza Giallo / Giallo (who cancelled) quando / era finito / Di Pingere (prima? cancelled) con Lacca e Giallo quasi solo e poi / Glaze with Ultramarine".
Ellis Waterhouse. Reynolds. London, 1973, pp. 21, 47 n. 48, pl. 48, as probably painted 1767–69, an example of the fact that Reynolds "almost seems to have painted with love . . . the great courtesans of the day".
Aileen Ribeiro. The Dress Worn At Masquerades in England, 1730 to 1790, and Its Relation to Fancy Dress in Portraiture. PhD diss., Courtauld Institute of Art, London. New York, 1984, p. 246, pl. 90, observes that her gown is based on oriental dress.
David Mannings and Martin Postle. Sir Joshua Reynolds: A Complete Catalogue of His Paintings (The Subject Pictures catalogued by Martin Postle). New Haven, 2000, vol. 1, p. 264, no. 939; vol. 2, fig. 938, as Mrs. Horton, later Lady Maynard (fl. 1764–?1814/15), probably painted 1767/69; observe that the paint surface is thin and the face very damaged; list three apointments with "Mrs. Houghton" in 1767, seven with Mrs. Horton in 1769, and a payment of 25 guineas for "Miss Hortoun" between August 1767 and February 1768; suggest that the technical note may mean "painted using copaiba . . . without yellow; yellow being added when the picture was otherwise finished".
Katharine Baetjer. British Paintings in The Metropolitan Museum of Art, 1575–1875. New York, 2009, pp. 74–76, 189, no. 31, ill. (color).