The Scots also put on a good show at the Royal Caledonian Ball, featuring many of the same people (Argylls, Dupplins, Hays, Roseberies, etc.).
The James de Boulay shown in one photograph is (I believe) the son of Laure de Boulay de la Meurthe, who used to edit Point de Vue, giving us many glittering photo spreads on her royal relatives. Please correct me if I'm wrong about his provenance!