This mystery can be found in the southeast of Snotinghamscire, near the bridge which crosses to Sherwood Hideout.
Kill the Picts and Speak with Ryce Sherwin
When you arrive at the scene you’ll find an Anglo-Saxon Soldier mourning the loss of his companions. Speak with him to begin the mystery and learn a bit more about the situation. At the end of the brief dialogue, you’ll be attacked by three Picts. These are just regular warriors, so they won’t cause you any problems. Defeat the Picts and then speak with the soldier again, who is now revealed as Ryce Sherwin. He’ll invite you to visit him at his hideout in Sherwood Forest, leading you to another mystery with his merry gang: The Good Men of Sherwood.