This Réunion des Musées Nationaux photo is all over the Web. The only photography credit is Agence Bulloz.
Mlle. de Nouille's dress is gorgeous from this angle with some, but not all, of her bustle showing beneath her off-shoulder vee neckline truncated by a modesty piece.
Keywords: 1884, Bonnant, off shoulder trapezoidal neckline, modesty piece, nertha, quarter length notched sleeves, vee waistline, close skirt, butle, gloves