Sophie Burkett was the daughter of JW's landlady at 8 Fitzroy Square. She later married W. E. Griffiths.
Burkett posed for JW in Rose and Gold: The Little Lady Sophie of Soho (YMSM 504) in 1898 when her sister Edith (the original sitter) was taken ill. Edith, explaining the title, said that JW 'told my mother my sister was 'fit to be a princess.' She recalled that the painting was finished at 110 rue du Bac, probably in about March 1899.
Shaw, Edith and Margaret F. MacInnes, 'Four Years with Whistler', Apollo, vol. 87, March 1968, pp. 198-201; Young, Andrew McLaren, Margaret F. MacDonald, Robin Spencer and Hamish Miles, The Paintings of James McNeill Whistler, New Haven and London, 1980.