The Full town lore can be found here. What you see below is a quick summary of it.
Arthorne is located north of the lake called, Lac au Duc or the “Duke’s Lake”, which is a 2 hour walk north of the city of Ploërmel. A logging town located deep in the woods, Arthorne is just mysterious enough for strange happenings to happen in the woods...
Founded by the Saint Morgayne, the story of Cairn Arthorne(translated roughly to mean Bear Fort or Bear Town) started with something miraculous. A fearsome bear was attacking the town, and the Saint, alongside her two dogs, chased it to the edge of town, and she called down the power of god as a lightning strike, felling the bear. At least, thats how the stories go.