The Costume Museum of Canada has a bonnet that is labeled as a wedding bonnet from 1846. It is in very good condition for its age, which surprises me as the sensible color and style would have made it practical for use after the wedding. Perhaps it is mislabeled and it is more of a mourning bonnet. Or perhaps it is a mislabeled reproduction!
I’m sure there was a lining that is now gone but this does serve to allow for a look at how it was built.