Much later …
A decent photo of a completed version of the hat I’m attempting is at the utterly gorgeous two swallows (scroll down a bit).
Pattern from the rainey sisters, in the sidebar on the right under “free patterns”.
It’s not as difficult or as complicated as I had imagined it would be. I’d not done yarn overs before, but they are surprisingly quite easy (thanks to tutorials from teh internets).
The biggest challenge will be completing and blocking before 8 October as the needles are so teeny.