.. was a look of demure, prim gentility. Hats of the 1820’s leading up to it were giant, stiff, and had a flirtatious air.
When the 1835 bonnet was introduced, the look of fashion changed, and so gowns had to change too. Bonnets became lavishly trimmed, feminine, soft, and coy. They would set fashion trends until about 1890.
(Sketches: left hats of the 1820’s vs right bonnets of the 1850’s. While at first they seem the same – lavishly over embellished, there is a different “feeling” that led to different behaviors by wearers in the different decades. As with most fashion – headwear was a reflection of women’s situations)