Step 3Construct crown
iImage Information

I like to sew the lining first, it gives me a sense of how difficult the stitching is. This one has a couple tricky points, where the outside curve of the side piece attaches to the inside curve of the crown. Pin carefully at the notch points. Another advantage of doing the lining first is that it's harder to sew the thin, hard rayon (or poly, or acrylic) than the thick, soft wool. Wool really wants to behave for you.
When you have both pieces together, press and/or topstitch the wool piece (I never bother with this for the lining). Then put the lining inside, wrong sides together, and baste around the bottom close to the fabric edge.
Post a pic of your hat when you're done, I'd love to see how it comes out.