This ‘Cabinet of Fashion’ fashion plate for the Lady's Monthly Museum, June 1805 shows a ‘Morning dress of cambric muslin with spencer cloak of blue silk. Full dress of straw-coloured sarsenet (sic) with a tunic of rich embroidered white crape. Hair dressed with ‘Diamonds set on Velvet, with a profusion of White Ostrich Feathers.’
Walking dresses had acquired a more free-flowing, gentle style by the time of this undated fashion print from the Lady’s Magazine, dated circa 1813-1814 (right). The lady's hat is sporting a huge ostrich feather.
By 1827 waistlines had become more distinct, and the lady in this later Lady’s Magazine print (below) is wearing an enormous poke bonnet.
You can see some fabulous images of Regency-era fashions here on Jane Odiwe's blog, and there's more info here on the Pemberley website.