Her article in thepeerage.com is here.
I was able to get a pedigree on this eBay print, one of the series of beauties associated with Queen Victoria's court.
Lady Susanna wears a dress with a vee neckline and pleated bodice and vee waistline under a lace wrap in this Cochran print.
Keywords: Susanna Innes-Ker, Dalbiac family, Innes-Ker family, Duchess, British, hurluberlu coiffure, off shoulder vee neckline, modesty piece, lace, elbow length notched sleeves, engageantes, vee waistline, full skirt, under-skirt, brooch, jeweled bodice ornament, clasps, bracelets, fan