Frivole's blog and tracked it down to Craftree. I really haven't got the hang of finding my way around Craftree. Luckily Muskaan came to my rescue again and kindly sent me a link to the PDF pattern. The design is by Nicola Bowersox. It was originally for needle tatting, but works fine with a shuttle. It starts with a chain, of course. I used the method I learnt a long time ago from the Julia Sanders book - just tie a knot in the thread, which prevents the core thread from disappearing.
I really like this pattern - can you tell? It's possible I went a bit overboard and won't need all these for my foodcover, but I think it will be a useful doodle to have in my tatting tin.