Nancy Weir Sheppard (nee. Huntly b.1890 - ?). Portrait of a seated lady

Nancy Weir Sheppard (nee. Huntly b.1890 - ?). Portrait of a seated lady, with a tribal mask and two figures behind her, signed N. Huntly over Sheppard, oil on canvas, unframed, 24 x 20in (61 x 51cm). The Mende figure behind the sitter appears to be the same figure offered by W. O. Oldman in 1906.