And there were the two posts that support the clerestory windows: they were also missing a decorative sheath. Ditto for the bathroom doorway.
I'm happy to report the trim is (finally!) in place. It's amazing how much more finished a look it gives our space.
(Now if I could only remember to install the two feet of missing floor trim—already painted and ready to go!—then I could say we've finished off our space.)
Please click on the pictures below for more details.