Lucinda Brant Author's pinterest posting of a close up of the lower right group had this comment, "If Looks could Kill! Beautiful Young Things give each other the once over. while promenading. Is that a new shawl? Pair of shoes? Have I seen that fabric before? Is it French? Who is that with Lady S? Ah... The pressures of looking good in public!"
From Wikimedia.
Panniers? What are those? Pouffs - Yes. Shorter skirts - needed to walk on the dirt paths. Hats - de rigueur. A group of sitters at left and three groups of promenaders, with two exceptions show a preference for ankle length full skirts, straight coiffures with large curls, and wide extensively decorated hats in this 1783 Gainsborough.
Keywords: 1783, Gainsborough, British, straight coiffure, feathered hat, floral hat, high enclosing neckline, high neckline, vee neckline, scoop neckline, sweetheart neckline, square neckline, collar, bows, fichu, long tight sleeves, waist band, natural waistline, vee waistline, over-skirt, ruffles, train, under-skirt, flounces, maxi-length skirt, shoes, neck band, earrings, wrap