The sitter, Sonia de Nikanoff [née Yanovski], niece of the artist. Duncan Phillips, Washington, D.C., by 1926.[1] (Paul Rosenberg et Cie., Paris); sold September 1936 to Chester Dale [1883-1962], New York;[2] bequest 1963 to NGA. [1]Published in Duncan Phillips, _A Collection in the Making_, 1926, plate 39. [2]On Dale's acquisition of the painting, see the manuscript of his autobiography, Archives of American Art, microfilm reel 3969, copy NGA curatorial records.