This does not look like a nine year-old girl to me.
From the Tansey Collection of Miniatures Web site.
Sofia's veil-wrap conceals all but a hint of sleeves in this Ahrbeck miniature.
Keywords: Ahrbeck, Sofia Potocki, Sofia Kiselyova, Potocki family, Kiseleff family, Countess, Russian, curly coiffure, veil, quarter length sleeves, over-sleeves