The provenance is listed as Stanford Hall, Leicestershire.
From fripperiesandfobs.tumblr.com/image/7412711923.
Christie's has a minimal description of this dress, "Black velvet, circa 1810-1820. trimmed with silver and gold lace throughout, slightly trained, with high waisted bodice. Clicking on the image will allow for looking at the silver and gold ebroidery of this striking dress.
Keywords: British, square neckline, upper puffed long close sleeves, Empire low waistline, close skirt, court dress