What an amazing adventure. I thought it was so interesting that there you are on the other side of the world, but you can bring your previous knowledge about British prehistory and it can have some bearing on understanding what you're looking at - it was the polissoirs you found and recognised that really caught my eye. But the carvings are just great too. The ones with the specs are very interesting. It could be nothing to do with it but I remember seeing some bone 'specs' in the British museum or somewhere - but really they were so people didn't get snowblind, they had a thin slot to peer out of. Is it conceivable the ones on your statues could be sunglasses too, maybe for when you're rowing out on the sea? Might be nothing to do with it. but a thought.