Find Dufrane's Treasure.
You use the decoder to decode the final message on the map...
"Just outside of my home, there is a long stone wall with a big old tree at the north end. It's where I asked my wife to marry me. At the base of that wall, you'll find a rock that has no earthly business in Asheran Forest. There's something buried under it I want you to have."
This stone is made of a strange black glass.
This black stone seems out of place.
Beneath the stone you find a chest full of gold and silver coins.
This was Dufrane's treasure... and now, it is yours!