Her article in thepeerage is here.
The original can be found here.
Lady Ure Primrose wears a poncho-like cover garment decorated with tassels over a dress with mildly puffed sleeves in this photo.
Keywords: 1907, Lafayette Photographic Studios, Elizabeth Caroline Dunsmuir, Lady Ure Primrose, Dunsmuir family, Ure Primrose family, British, straight coiffure, feathered hat, capelet, tassels, elbow length puffed sleeves, natural waistline, gloves, wrap, lace