I found a bunch of copy paper boxes lying around, so I brought them home to make my first 18th C stays mockup. I'm flying a little blind here, since I've never made any 18th C before. So please let me know if you have any advice. I don't want to do major alterations to the pattern (though I know I have to add more room to the waist), but I can handle simple things. So, here we go, with pictures:
The JP Ryan Pattern
Tracing the Pattern onto Cardboard
Cardboard Pieces, Ready to be Taped Together
It's too small in the waist. By my calculations, I should add 1.75 inches to the waist of the pattern.