Some really nice pictures - but most of them are too late for me.
My prefered time range are the late 1790ties, with those feminine slightly rounded, but still slender looking dresses.
After the 1805 the fashion grews rather stiff in my eyes, and rather unbecoming (at least for me)
To show what I mean - some pictures - there are many beautiful fashion plates by Nicholas van Heideloff
Many good pictures for your research may be found here:
1794 - by N. Heideloff,
1799 - by N. Heideloff