You found a letter inside a bottle. Take it to Sahnu.
Step 1. Bring the letter to SahnuA Seiren found outside Old Nahor Castle in Brusthonin. She is looking for her lost sister..
Step 2. Ask GunterAn antique document restoration expert at Temple of Knowledge in Pandaemonium. to restore the letter.
Step 3. Return to Sahnu.