I'm not wearing them together because it is still much too hot for September and the material is rather heavy. I made them with this pattern from the Vintage Pattern Lending Library:
It's interesting to see how different these dresses look on real people versus the pattern envelope illustrations. I also don't know how anyone could wear the dress open in the back as is shown in the small drawing (I tried it; it's alright as long as you don't lean over)! Maybe she's just wearing it that way to cool off after a rousing game of tennis, hmm?