A medieval town of 5000 would take up 82 acres, or one eighth of a square mile.

The problem is that 5000 townsfolk probabaly means 50,000 famers.

If elves (and giants, and dragons) live and are sustained by Mebhaighl, rather than by harvesting food (plant and animal), and the humans come and tear up the natural world to plant their slave-plants in their precise rows against all that is true and right and natural, hunt by killing the strong beasts rather than culling the weak, and in every way offend what is the right way to live in harmony with the land.

After all a province 1 with Rjurik hunters devoted to Erik still drops the source potential by 1.