The Bertha. The frilly, poofy, thing that trims the neckline of the 1865 ball gown I'm re-creating. It was definitely the piece of this gown I spent the most time attempting to figure out how to make. XXII: In: A.03. The dress of Wilhelmina von Hallwyl the E. Boutibonne in Interlaken, Switzerland. Once the bodice itself was done, I spent an awful lot of time staring at this picture trying to see exactly how the bertha may have been constructed. At a glance it's easy to see the the bertha is…