Both of them slip through thepeerage entirely. The Wikipedia article for Nathaniel Curzon, 1st Lord Scarsdale is here.
From titam.tumblr.com; size doubled and image sharpened by gogm.
This shows the limits of British casual dress - Lady Scarsdale has to hike up her over-skirt to walk about.
Keywords: 1761, Hone, Caroline Curzon, Colyear family, Curzon family, British, long straight coiffure, ribboned feathered hat, sweetheart neckline, ruff, bows, elbow length notched puffed over-sleeves, three quarter length notched puffed under-sleeves, waist band, natural waistline, over-skirt, shoes