After going to see Discover Odin on 4th/ 5th Oct 2001, British Museum there’s another state of affairs. The king stone is the World Tree and the nine stones either side represent the nine moons that Odin hangs on the World Tree looking for answers/ powers.
A note on the 19 stone type scenario that is so common in Penwith. I’ve heard tell that each one of these circles has a ‘sun’ stone or ‘king’ stone (quartz and set in the West it seems to me). Two crecents of nine stones representing waxing and waning moon and triple goddess type scenarios (virgin, mother, crone) advance on the sun/king stone. Some kind of ceremony. Hmmmm.