I could find the picture on Pinterest via Google Images but no-one ever bothers to credit and link the designers there. So frustrating! Eventually I found the chart on the Casa Cenina website. Hooray!
Here is the Dancing Skeleton on his own, this would make a great ornie by itself:
And here is the completed piece:
When I had finished stitching I showed it to my son and said "It's a skeleton, some ghosts and some long legged beasties, I think". He was the one who realised that the black shape is actually a skeleton cat. Sometimes you can be too close to a piece to see it!