: What I've done is create a map of Myth divided into 49
: sectors, a 7x7 grid. I belive one rune to be in each
: of these sectors, as the original One Dream from which
: Wyrd awoke was where his vision of the known world
: came from. However, I also belive that the final map
: will be a mirror of the world of Myth. Literally. The
: locations of the runestones are flipped from where you
: would think them to be.
All of the arguments stated above make sense, assuming of course that the map that is given to us of Myth is the entire world. However, GURPS tells us that there is strong belief in areas to the North-East, South-East, and due West. Although these lands appear to be only legends, they may still exist. Thus, all of the runestones may be scattered across the entire world, which may be quite larger than we see. So, there may be only a few runestones centered around the area of the Myth world, as the other 37 would exist elsewhere around the world, too far for most archmages to research and come back and name for the rest of the magus society to learn about.
It is extremely plausable that there have been people who have ventured past the borders given to us in the Myth maps, but they may also be closely guarded secrets, and rarely used in the company of others to prevent knowledge of the dream.
However, if we still use Tharsis as about the center of the world, Forrest's logic makes a lot of sense, although the rest of the runestones would not necessarily be on the peninsula of the Myth world.