Whereas petticoats and inner structures of 18th-century clothing were solid and more or less rigid, the Boué Soeurs dress, despite the resemblance in robe-de-style silhouette, reveals its 20th-century disposition in its lingerie-like revealing lightness - like the merest trellis for an arbor of silk flowers. A penchant for sweet, three-dimensional buds is, of course, shared by the rococo and the Boué Soeurs.