I'm just waiting for the paint to dry etc. and I came across an on-line version of the 1906 classic;http://www.archive.org/details/lepantalonfmin00dufa
Le Pantalon Féminin.
This is the 1916 edition which is"profusely illustrated." I haven't figured out how to use GOOGLE Translate on the pages yet but this appears to be a history of ........women's underpants up to the beginning of the 20th Century. If you have any questions of what women's underwear looked like in the opening years of World War One, (the film Flyboys got it wrong) then the following illustrations will help you out.
The one below appears to represent the mid 1800s....