C.1895. These were popular as they cut down on the bulk you wore underneath your dress. This example dates to about 1895 and I've seen them worn two ways: 1) underneath your corset as a chemise and pantaloons or 2) worn over the corset as a corset cover and pantaloons. With the first way, you have to wear a corset cover on top and the second way, you'd wear a chemise underneath. Depending on your measurements, you have either option, both are correct.
They are made out of a soft cotton batiste,
have lace around the neckline, and pant legs. The crotch is split for ease when "nature calls" and the body is fitted with darts at the front so
it can be used as a corset cover. They are completely handsewn. They fasten with mother of pearl buttons down the front and the bum at the back is gathered to accommodate a large rear.
The size is pretty decent too. I can fit into this with a corset on and could be worn by someone up to 5'9". Bust: 39 1/2" but a bust of 40" could fit into it too. Waist: 34 1/2", Length: approx. 40".
(Formerly L. Hidic)