I came at this series with the express purpose of doing a very closely integrated set of prints. It started in my sketchbook on a single page as nine "thumbnail" drawings. I thought of them as rather skeletal. And the name for the series came from that thought. The nine prints in the formal series are accompanied by a key - close renditions of the original drawings. So the nine are hung in a square grid, with key hung in close proximity. Available as sets only. The prints are each 9x9". Individual prints are $50, all nine with accompanying key $450, unmatted plus shipping.