If you are a member at The Quilt Show #203 is about her. I only have a free membership there so can't view the whole thing.
In Ricky Tims article it mentions using embroidery stitching around the appliqués so that would lead me to believe there was no backing added after the appliqué but you never know....
https://www.rickytims.com/1636-quilt...zanne-marshall