As promised, here’s the step-by-step for installing the pocket. To refresh your memory on what the pocket is supposed to look like, you can refer back to the portrait.
First we start off with the interlining for the “poof”. I cut it from the last of the wool that I’ve used for years and years for this sort of thing. It provides body and springiness and I’ll miss it terribly. There wasn’t enough of it left by this point to get the whole thing out of one piece. Instead of trying to piece in scraps of the same stuff (which would make really bulky seams) I finished the ends off with some cotton I’ve been using for patterning. Conveniently enough, this will help reduce bulk at the inner leg, which is always a good thing in these situations. The poof was patterned based on the trunk hose pattern, with the pieces spread apart. I eyeballed a lot of lengths and had to make a few changes along the way, but it seems to have turned out okay.