sjö

I had always through that the northernmost ocean was mare septentrionale as the seventh of seven seas. I am incorrect. The seven are the oxen hitched to the stars that mark the north. The Arctic Ocean belongs to the Great Bear, but mare septentionale is the ocean of the seven oxen that pull the Starry Plough.

Gefjon drew Sjælland out of Sweden with four oxen. It takes three more to pull the earth around the axle of heaven.