I understand Carol was inspired by Val Zeitler's Young Marie collection, as featured in Haute Doll Magazine a few years ago. (It was a collection created for Sky, a Peak's Woods BJD, and what inspired my very first BJD purchase.) Carol created her own French Court Petit Trianon cotton day dress of this lovely floral print, trimmed with lace, ribbon and roses.
She even created a wig for Prudence as well. See the cute little blue bird, peeking through the top?
You can see additional photos of this outfit on my Flickr photostream. Enjoy!