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By the early 1920s women’s bathing suits were reduced to a one piece garment with a long top that covered shorts. Though matching stockings were still worn, swimwear began to shrink and more and more flesh was exposed from the bottom of the trunks to the tops of the stockings. By the mid-1920s Vogue magazine was telling its readers that “the newest thing for the sea is a jersey bathing suit as near a maillot as the unwritten law will permit.”
Ch 29.2 "Did you go sea bathing?" he politely enquired. "Oh heavens, no!" replied Georgiana, quite shocked. "But we did go for several strolls along the promenade. It was most invigorating!" This pic - Sea Bathing for the genteel in the Regency Period. Ladies were loaded into closed carts which were backed into the sea by horses. These functioned partly as dressing sheds. Once in position, the horses were unhitched, leaving the sheds as a refuge.