North Passage

The old association is red-south, white-west, black-north, yellow-
east. That's also where the four colored Seas are (the Mediterranean
is still the White Sea to the Turks). Therefore the Black Sea is the
Northern, Polar Sea. It follows that there *must* be a navigable
passage from the Black Sea to the Baltic. That's why the classic
writers find Tanais's etc. at both ends of the supposed passages.

Torsten